Telipogon is a species-rich Neotropical orchid genus comprising roughly 260 to 280 species, distributed from southern Mexico through Central America and the Caribbean to northern and western South America, with its center of diversity in the northern Andes, particularly Colombia and Ecuador. The genus is instantly recognizable to specialists by its usually non-resupinate flowers, often striped or spotted, and a short column frequently bearing tufts of prominent bristle-like setae. Within it, a group of small plants, often less than 10 centimeters tall with flowers usually under 2 centimeters across, was historically classified under several separate genera, including Stellilabium. Molecular phylogenetic work published in 2005 and 2012 showed that these miniature species are nested within Telipogon rather than forming their own lineage, and they were transferred accordingly.

The first of the new species, Telipogon marietalamae, was discovered near Pachicutza in Zamora Chinchipe Province during a botanical inventory in January 2023, with a second population found about 2.3 kilometers away in subsequent explorations. The plant is an epiphyte up to 6 centimeters tall, growing on moss-covered twigs and trunks in the understory of secondary piedmont forest at elevations of roughly 1,170 to 1,317 meters. Its flowers, measuring about 7 to 11 millimeters, combine opaque lemon-green sepals, matte yellow-orange petals, and a mahogany to dark vinaceous lip with a yellow apex. The column bears dense tufts of 29 to 35 stellate setae, each up to 2.2 millimeters long with two to four white apical tips, a feature that helps separate it from its closest relatives.

The species epithet honors Marieta de Jesús Alama, grandmother of coauthor Nadia Lapo and mother of Lester Lapo, the orchid grower who first found the plant. Morphologically, T. marietalamae most closely resembles T. leisberthvelezii, described from the western slopes of the Cordillera del Cóndor in 2024, but differs in having one-veined, ligulate-lanceolate petals rather than three-veined, narrowly obovate ones, a swollen rather than flat lip base, a narrower velvety mid-lobe of about 2.5 millimeters wide, and denser, longer setae tufts. It also differs from T. jostii of Tungurahua and Pastaza provinces in flower color, larger sepals and petals, and column shape. Ecologically, the three species occupy distinct settings: T. marietalamae in the eastern Andean foothills understory, T. leisberthvelezii in the canopy of the isolated Cordillera del Cóndor, and T. jostii on guava twigs at similar elevations of roughly 1,100 to 1,350 meters.

The second novelty, Telipogon puyensis, was first encountered in 2016 along an ecotourism trail beside the Puyo River near the city of Puyo in Pastaza Province. Targeted searches in 2024 revealed a small patch of three individuals plus one more plant about 500 meters away. Larger than its relative at up to 14 centimeters tall, the species produces burgundy-maroon, non-resupinate flowers with a white-pink column and setae that are hispid, or bristly, from near the middle to the apex, a character the authors report as unique among miniature Telipogon. Its inflorescence is terete and sometimes branched, unlike the compressed, unbranched stalks of its relatives, and its petals are incurved, arcuate, and glabrous. The name refers to Puyo, which means fog or cloud in the Quichua language.

Remarkably, T. puyensis survives in a heavily disturbed urban landscape. The plants were found growing on remnant trees along the river margins and even on ornamental non-native shrubs in landscaped private gardens, at the western edge of the Ecuadorian Amazon. The riverside park still preserves large Vochysia and Dacryodes trees and rare endemics such as the magnolia Magnolia kichuana and the recently described Browneopsis puyensis, retaining structural elements of remnant primary forest despite surrounding urban expansion. The orchid grows sympatrically with other epiphytic orchids including Maxillaria reichenheimiana, Pleurothallis sphaerantha, and Sobralia rosea.

To test whether the morphological distinctions reflected genuine evolutionary separations, the team generated new DNA sequences for five Ecuadorian species and combined them with published data from GenBank, producing a dataset of 35 terminal taxa analyzed with the nuclear ribosomal internal transcribed spacer and the plastid matK marker. Bayesian inference and maximum likelihood analyses recovered Telipogon as monophyletic with strong support, and placed both new species within a well-supported clade of Andean miniature Telipogon sharing an unlobed column. Telipogon puyensis emerged as the earliest-branching member of this group, sister to a lineage containing T. alexii, T. cf. alticola, T. jostii, T. leisberthvelezii, and T. marietalamae, while T. marietalamae itself was resolved as sister to T. jostii plus T. leisberthvelezii, though with weaker support for some internal relationships. Crucially, the distinctness of both new species was consistent across all inference methods and markers.

The phylogeny also delivered an unexpected taxonomic verdict. Accessions identified as Telipogon hystrix from Mera and Topo, together with material attributed to T. reventadorensis from Borja in Napo Province, formed a single strongly supported clade with no detectable genetic differentiation. A detailed comparison of original descriptions, illustrations, and newly collected living plants likewise found no consistent diagnostic characters separating the two names; both share a subterminal inflorescence, obovate to spatulate ciliate petals, a sagittate lip with a callus-like swelling bearing retrorse spine-like hairs, and a short column with densely stellate-setose lateral lobes. The authors therefore synonymized T. reventadorensis under T. hystrix, extending the known range of the latter from Tungurahua into Pastaza and Napo provinces at elevations of 1,150 to 1,500 meters. A taxonomic key to all sixteen Ecuadorian miniature Telipogon species accompanies the paper.

Both new species received preliminary assessments as Critically Endangered under IUCN criteria B1ab(iii)+2ab(iii). Telipogon marietalamae is known from only two localities about 2.3 kilometers apart within a single river catchment near the towns of Pachicutza and El Pangui, with an area of occupancy estimated at 8 square kilometers and at least eight individuals observed. Telipogon puyensis has an even smaller footprint, with an area of occupancy of 4 square kilometers and two subpopulations less than 500 meters apart in a landscape under active urban expansion. Habitat threats documented for the foothill populations include uncontrolled deforestation driven by infrastructure development, dry-pit extraction of construction aggregates, and slash-and-burn clearing for cattle pastures and cacao and plantain plantations. Because so few records exist, the extent of occurrence could not be calculated directly and was inferred to equal the area of occupancy, following IUCN guidelines.

The authors note that the eastern Andean foothills remain poorly explored and that additional subpopulations of both species may yet be found, but the combination of extremely restricted ranges, tiny population sizes, and ongoing habitat degradation makes these orchids acutely vulnerable. The discovery of two narrowly endemic species within a single genus in such close proximity reinforces the view of the eastern Ecuadorian Andes as a center of diversification for miniature Telipogon, and underscores how much of this biodiversity remains undocumented in forests that are disappearing under pressure from agriculture and urban growth. The team cautions that further botanical exploration and conservation assessment in these regions is urgently needed, particularly for peri-urban ecosystems such as the Puyo riverside forest, which local urban planning frameworks currently do not prioritize.

Subject of Research: Description of two new miniature Telipogon orchid species and a synonymization from Amazonian Ecuador

Article Title: Telipogon marietalamae and T. puyensis ( Orchidaceae , Oncidiinae ), two new species from the Amazonian region of Ecuador

Article References: Jiménez, M. M., Lapo-Gonzalez, N., Gutiérrez del Pozo, D., Kuethe, J. R., Baquero, L., Garzón-Suárez, H. X., Martel, C., & Iturralde, G. A. (2026). Telipogon marietalamae and T. puyensis (Orchidaceae, Oncidiinae), two new species from the Amazonian region of Ecuador. PhytoKeys, 280, 213-238. https://doi.org/10.3897/phytokeys.280.196965

Image Credits: AI Generated

DOI: 10.3897/phytokeys.280.196965

Keywords: Telipogon, Orchidaceae, Ecuador, new species, phylogenetics, Amazonia, taxonomy, conservation, Critically Endangered, miniature orchids, Andes, IUCN Red List

The researchers combined field observations and measurements of living plants with examinations of original type material, historical herbarium specimens, published descriptions and distribution records. Korean fieldwork on the E. thunbergii-like taxon had begun in 2012 and continued through 2025, while additional investigations in northeastern China were conducted from 2013 to 2019. Type specimens were examined directly or through high-resolution digital images, and voucher material was reviewed from major collections in Korea and elsewhere, including A, AMES, GH, HNWP, IFP, K, KB, KH, KUN, KYO, LE, MHA, MW, PE, P, TI, TNS and WU.

Historically, Korean floras had treated the taxon resembling E. thunbergii as the same species. Its discovery in the northern and southwestern parts of the Baekdudaegan and on western coastal islands prompted a reassessment because earlier floristic accounts did not provide sufficient diagnostic information. Comparison of living material, voucher specimens and type material showed that these Korean plants correspond to E. xanthophaea, a species described from northeastern China in 1922.

The clearest distinction lies in the flower’s lip. E. thunbergii has a short, sometimes inconspicuous mesochile measuring 1–2 mm, a cymbiform hypochile with low ridges and an epichile bearing a pair of low keels. E. xanthophaea instead has an elongated, distinct mesochile measuring 5–6 mm, a smooth cymbiform hypochile without ridges and an ovate-orbicular epichile without keels. The two species share a general resemblance in habit and floral structure, but these consistent lip characters support their separation. By contrast, E. papillosa belongs to section Epipactis and lacks a mesochile; its hypochile is subglobose-saccate and its epichile is narrowly cordate to triangular.

Other measured traits reinforce the identification. E. thunbergii is typically 30–70 cm tall, with lanceolate to ovate-lanceolate leaves, a glabrous inflorescence and dark to light greenish-yellow flowers. E. xanthophaea is generally 40–90 cm tall, with elliptic to ovate-elliptic leaves, a papillose inflorescence and yellowish-brown, yellowish-red or red flowers. The revision reports E. papillosa as 30–80 cm tall, with ovate to broadly ovate leaves, a papillose-pubescent inflorescence and pale green to green flowers.

Habitat records also distinguish the species. E. thunbergii was reported from moist meadows, forest-swamp edges, moist valley edges and coastal rocky areas. E. xanthophaea was associated with sunny, moist sites, including wetlands, marshy ground and the edges of waterways, where its rhizomes may be submerged in deposited silt and water. E. papillosa occurred mainly in shaded deciduous or mixed forests, including sites with calcareous soil, although the revision states that it can tolerate moderately acidic soils.

Herbarium and literature evidence also revised the distribution of E. xanthophaea. Although previously regarded as restricted to northeastern China, it is now recorded from Korea, China and the Russian Far East. Its confirmed Korean distribution includes Jagang-do, Hamgyeongbuk-do, Gangwon-do, Gyeongsangnam-do and Incheon. The Korean populations connect records from northeastern China with those in the Russian Far East, while historical specimens collected in northeastern China and northern Korea support continuity across the region. E. thunbergii is recorded from Korea, Japan and eastern China, and E. papillosa from Korea, northeastern China, the Russian Far East and Japan.

The treatment resolves several nomenclatural questions. Epipactis gigantea var. manshurica is accepted as conspecific with E. xanthophaea rather than E. thunbergii, primarily because of concordant lip morphology, with plant habit, leaf shape and leaf attachment providing additional support. For E. papillosa, the varieties var. imkoeensis and var. sayekiana, as well as E. sayekiana, are treated as synonyms because they do not show consistent morphological differentiation at population level. The study also designates the specimen Limpricht 2915, preserved at WU as WU0061592, as the lectotype of E. xanthophaea because no holotype had been selected in the protologue and the presumed original Berlin material was likely destroyed in 1943.

The conclusions are constrained by the nature of the material available. Some type specimens were assessed from high-resolution digital images rather than direct examination, and the authors explicitly acknowledged the limitations of image-based comparisons. Russian populations were evaluated through herbarium specimens and available digital resources because no direct field investigation was conducted in Russia. In Korea, some reported localities of E. xanthophaea remain unconfirmed: one is supported only by photographs, one by a historical record, and one by a single specimen without recent confirmation. Within these limits, the comparative morphological analysis supports recognizing three Epipactis species on the Korean Peninsula and documents E. xanthophaea as a distinct Korean member of the genus.

Subject of Research: Taxonomic revision and distribution of three Epipactis orchid species on the Korean Peninsula

Article Title: Taxonomic revision of Epipactis Zinn ( Orchidaceae ) on the Korean Peninsula

Article References: Lee, J.-S., Koo, J.-Y., & Kim, M.-H. (2026). Taxonomic revision of Epipactis Zinn (Orchidaceae) on the Korean Peninsula. PhytoKeys, 278, 205-231. https://doi.org/10.3897/phytokeys.278.195337

Image Credits: AI Generated

DOI: 10.3897/phytokeys.278.195337

Keywords: Epipactis, orchids, Orchidaceae, taxonomic revision, Korean Peninsula, plant morphology, species distribution, herbarium specimens, Northeast Asia, Taxonomic, revision, Zinn

The genus Gastrochilus belongs to the orchid subfamily Epidendroideae and comprises roughly 89 species distributed from tropical to warm-temperate Asia. Members of the genus are epiphytes, meaning they grow perched on tree trunks, branches, or rock faces rather than rooted in soil, drawing moisture and nutrients from the air, rain, and debris that accumulate around them. Botanists recognize Gastrochilus readily by two hallmark traits: a saccate hypochile, the lower portion of the lip that swells into a distinct pouch or spur, and two sub-globose pollinia, the compact pollen masses, attached to a slender stipe. What makes the new species remarkable is the pace of discovery in this genus. Most Gastrochilus species were described only in the past two decades, and more than 20 have been added in just the last five years, particularly from the mountainous regions fringing the Sichuan Basin in southwestern China.

The encounter happened during a field survey in Qijiang District, at elevations between 800 and 1,100 meters, in forest not far from Jinfo Mountain in neighboring Nanchuan District. The flowering plants showed the falcate-oblong, sickle-shaped leaves and the subtriangular lip lamina with a thickened central cushion characteristic of Gastrochilus sect. Acinacifolii, one of six sections into which the genus has been subdivided based on accumulated molecular and morphological evidence. But one feature stood out immediately. Where its relatives wear yellowish-green flowers decorated with purplish-red spots, these plants bore golden-yellow flowers with no deeper markings at all. The researchers hypothesized they had found a new member of the same section as the morphologically similar G. fargesii, and set out to test that idea with both morphology and DNA.

Field collections were made in Heishan Valley, where herbarium specimens and silica-gel-dried leaves were gathered from plants growing on tree trunks and rock walls. Morphological observations and measurements were performed on both living plants and dried voucher specimens, now deposited at the CDBI herbarium, with descriptive terminology following standard botanical conventions. For the genetic work, leaf samples from two individuals of the putative new species, collected from two different subpopulations, were analyzed alongside three accessions of G. fargesii, including one from an earlier study and two newly obtained samples, one from the type locality of G. fargesii in Chengkou County and another from Jinfo Mountain.

Total DNA was extracted exclusively from the silica-gel-dried leaves, and the team amplified the nuclear ribosomal internal transcribed spacer, nrITS, together with four chloroplast markers: matK, psbA–trnH, psbM–trnD, and trnL–F. These five regions, spanning both the nuclear and plastid genomes, are the standard phylogenetic toolkit for this genus, allowing comparison with sequence data for 60 species retrieved from GenBank. Before combining the datasets, the researchers checked congruence between the nuclear and plastid markers using the incongruence length difference test, which returned a P value of 0.15, confirming that the two data partitions could be safely merged. The aligned nrITS dataset comprised 687 nucleotides, of which 201 were variable, while the combined plastid dataset totaled 3,456 base pairs with 213 variable sites.

Phylogenetic trees were reconstructed using both maximum likelihood and Bayesian inference. The best-fit nucleotide substitution model, GTR+I+G, was selected based on the corrected Akaike Information Criterion. The Bayesian analysis ran two independent Markov chain Monte Carlo simulations for 20 million generations each, while the maximum likelihood analysis assessed branch support with 2,000 bootstrap replicates. Six species of Aeridinae, the orchid subtribe to which Gastrochilus belongs, served as outgroups to root the tree. The results were unambiguous. Gastrochilus was recovered as a well-supported monophyletic group, meaning all its members descend from a single common ancestor, and the clades corresponding to the six previously recognized sections received strong support, validating the existing classification.

Within that framework, the two accessions of the new species, ZJY332 and ZJY333, collected from sites separated by cliffs in a limestone valley roughly 3.5 kilometers long, formed a single well-supported lineage with maximal statistical support, a Bayesian posterior probability of 1 and a maximum likelihood bootstrap value of 100. This lineage was sister to the clade containing the three accessions of G. fargesii, supported at 1/95. The near-identical DNA sequences of plants from different sites confirmed that despite the physical barriers between them, they belong to one species. The subclade uniting the new species with G. fargesii was further nested among other members of G. sect. Acinacifolii, exactly as the morphological hypothesis predicted.

Morphologically, the new species can be distinguished from G. fargesii by a suite of stable characters. Its stems are shorter, spanning 2.0 to 8.0 centimeters compared with 3.0 to 13.0 centimeters in G. fargesii. Its leaves are broader, falcate-oblong blades measuring 0.8 to 1.5 centimeters wide, whereas G. fargesii carries narrowly falcate-linear leaves only 0.4 to 0.6 centimeters across. Most dramatically, its flowers, roughly 1.2 by 1.4 centimeters, are golden yellow without spots, while G. fargesii produces smaller yellowish-green flowers about 0.9 by 1.2 centimeters marked with purplish-red spots. The hypochile, the pouch-like base of the lip, is also taller in the new species, reaching 4.8 to 6.5 millimeters with a rather acute apex, compared with the shorter, obtuse-tipped hypochile of G. fargesii. The two species even flower at different times: the new species blooms from September to October, while G. fargesii flowers from May to June. With these differences, the team concluded the plant merits recognition as a new species, raising the number of species in sect. Acinacifolii to 13.

The biogeographic story is equally compelling. G. fargesii is the only member of its section distributed in northeast Chongqing, with its type materials collected from the Daba Mountains in Chengkou County in 1893 by the missionary botanist P. G. Farges. A review of specimens previously identified as this species led to the exclusion of its reported distributions in Sichuan and Yunnan, which stemmed from misidentifications, while confirming its presence in southern Chongqing and northern and southeastern Guizhou. The three sites of the new species lie not far from a known population of G. fargesii in Nanchuan, and the two species share both morphological and phylogenetic affinities. This pattern suggests that members of the section continued to diversify as they expanded northwards along the mountain ranges bordering the Sichuan Basin, even though most species in the group are found farther south. The authors believe further explorations in adjacent regions may reveal additional species in this section or uncover overlooked diversity among the tree-trunk epiphytic orchids of these mountains.

Conservation prospects, however, are grim. The three known subpopulations, located at Jiaozigou, Heishangu, and Houwangdong in Heishan Town, comprise a total of over 50 mature individuals, all restricted to a single valley subject to continuous anthropogenic disturbance and habitat degradation associated with tourism. The area of occupancy is estimated at just 8 square kilometers using the standard 2 by 2 kilometer grid method, and the extent of occurrence is even smaller, roughly 1.3 square kilometers. Although the total number of mature individuals exceeds 50, precluding evaluation under Criterion D, the geographical range parameters strictly meet the thresholds for Critically Endangered under Criterion B, and a continuous decline in habitat quality and extent has been observed. The species is therefore formally assessed as Critically Endangered, with the designation CR B1ab(iii)+2ab(iii). The specific epithet immaculatus refers to the spotless sepals, petals, and lip of this golden orchid, whose Chinese name, su xin peng ju lan, translates as spotless-heart Gastrochilus. Whether this luminous flower survives the pressures of its only valley will depend on how quickly its habitat can be protected.

Subject of Research: New epiphytic orchid species Gastrochilus immaculatus discovered in Chongqing, Southwest China

Article Title: Gastrochilus immaculatus ( Orchidaceae , Epidendroideae ), a new epiphytic orchid from Chongqing, Southwest China

Article References: Zhang, J.-Y., Liao, M., Yang, P.-Y., Cheng, Y.-H., Wu, J.-Z., Zhang, P.-C., Yu, D.-X., Chen, F., & Xu, B. (2026). Gastrochilus immaculatus (Orchidaceae, Epidendroideae), a new epiphytic orchid from Chongqing, Southwest China. PhytoKeys, 280, 165-179. https://doi.org/10.3897/phytokeys.280.206936

Image Credits: AI Generated

DOI: 10.3897/phytokeys.280.206936

Keywords: Gastrochilus, immaculatus, Orchidaceae, Epidendroideae, epiphytic, orchid, Chongqing, Southwest, China, scientific research

The identification of Pleurothallis pembertonii highlights the ongoing difficulties in delimiting species within the Pleurothallidinae subfamily, where extensive morphological convergence often leads to confusion and misidentification. For years, specimens of this new species were misidentified as Pleurothallis forceps-cancri or P. amphigya in horticultural collections, online databases, and photographic records. This persistent taxonomic ambiguity underscores the need for rigorous, field-based taxonomic approaches that integrate morphological analysis with precise locality data. The new species is distinguished by its vinaceous, oblong-subsigmoid petals that are long-attenuate, and a sagittate-trilobed lip bearing a well-developed reniform glenion and two small divergent basal keels, features that remain stable across all examined individuals.

The discovery process involved a scientific expedition to the Dracula Reserve in 2022, where researchers documented the plant in situ using high-resolution photography and collected voucher specimens for herbarium deposition. The holotype specimen, collected at 1965 meters elevation, is deposited at the Ecuadorian National Herbarium under specific research permits. Additional paratypes were collected in 2024, further confirming the presence of the species in the reserve. To support detailed morphological analyses, floral material was preserved in ethanol and examined under a stereomicroscope, allowing for a comprehensive comparison with original descriptions and type material of morphologically similar species. A Lankester Composite Digital Plate was prepared to illustrate the diagnostic features of the new orchid, following standardized protocols for scientific documentation.

Morphologically, Pleurothallis pembertonii is an epiphytic, caespitose herb reaching up to 12 centimeters in height, with slender roots and terete ramicauls. The leaves are suberect, coriaceous, and elliptic-ovate, while the inflorescence consists of a single-flowered coflorescence surrounded by a papyraceous spathaceous bract. The flowers exhibit moderate variation in size and posture, with the dorsal sepal ranging from nearly straight to distinctly arcuate. However, the principal diagnostic characters, including the shape of the petals and the structure of the lip, remain consistent throughout the population. This stability in key morphological traits provides a reliable basis for distinguishing the new species from its close relatives in the series Amphigyae.

The habitat of Pleurothallis pembertonii is the Lower Montane Evergreen Forest of the Western Andes, an ecosystem characterized by high humidity, persistent cloud cover, and exceptional levels of plant endemism. This biogeographic transition zone between the Tropical Andes and the Chocó biogeographic region promotes high rates of diversification due to steep environmental gradients and historical isolation. The species occurs sympatrically with several other epiphytic orchids, including Dracula trigonopetala and various Lepanthes species, reflecting the high structural complexity and ecological stability of the forest. The presence of these specialized epiphytes underscores the importance of maintaining old-growth trees and stable humidity regimes for the survival of such narrow-endemic species.

Conservation concerns are paramount for Pleurothallis pembertonii, as its known distribution is extremely restricted to a single locality within the Dracula Reserve. The area of occupancy is estimated at just 4 square kilometers, placing the species in the Critically Endangered category under IUCN criteria. The primary threat to the orchid is the extensive overlap of its habitat with active and proposed mining concessions, which promote forest loss, fragmentation, and long-term alteration of the humid microclimatic conditions essential for epiphytic orchids. Land-use change in montane forests has been shown to cause severe declines in vascular epiphyte richness, particularly affecting species that depend on mature host trees. The omission of precise geographic coordinates in the published record is a deliberate measure to reduce collection pressure on this vulnerable population.

The case of Pleurothallis pembertonii illustrates a broader issue in the taxonomy of Neotropical orchids, where the international trade in plants has facilitated the circulation of undescribed taxa under misapplied names. Many species have entered commercial markets before formal taxonomic resolution, often lacking reliable locality data, which complicates conservation planning and threat assessments. When species are described without verifiable provenance, they remain invisible to spatial analyses and may be subject to unsustainable extraction from unknown or highly restricted wild populations. This highlights the urgent need for integrative taxonomic approaches that combine field observations with molecular phylogenetics to accurately delimit species and inform conservation strategies.

The discovery of this new orchid also emphasizes the critical role of private conservation initiatives in protecting biodiversity in the Tropical Andes. The Dracula Reserve, managed by Fundación EcoMinga, safeguards extensive tracts of well-preserved cloud forest that serve as refugia for numerous microendemic species. The occurrence of Pleurothallis pembertonii within this reserve demonstrates the effectiveness of such efforts in maintaining habitat continuity and protecting narrowly distributed epiphytic species. As environmental pressures continue to mount, the collaboration between scientists, conservation organizations, and local communities will be essential for preserving the unique flora of this region. The new species serves as a reminder of the hidden diversity that remains to be discovered and protected in the world’s most biodiverse ecosystems.

Future research on Pleurothallis pembertonii should focus on expanding the known distribution of the species and assessing its population dynamics in response to environmental changes. Continued monitoring of the Dracula Reserve will be crucial for detecting early signs of habitat degradation and implementing timely conservation interventions. Additionally, further taxonomic studies within the series Amphigyae may reveal additional cryptic species that have been overlooked due to morphological similarity. By addressing these gaps in knowledge, researchers can contribute to a more comprehensive understanding of orchid diversity in the Tropical Andes and develop more effective strategies for its conservation. The story of Pleurothallis pembertonii is a testament to the intricate balance between biodiversity, human activity, and the ongoing quest to document and protect the natural world.

Subject of Research: Pleurothallis pembertonii (Orchidaceae, Pleurothallidinae), a new species from northwestern Ecuador in the Tropical Andes Biodiversity Hotspot

Article Title: Pleurothallis pembertonii ( Orchidaceae , Pleurothallidinae ), a new species from northwestern Ecuador in the Tropical Andes Biodiversity Hotspot

Article References: Monteros, M. F., Holcomb, K., Baquero, L. E., & Wilson, M. (2026). Pleurothallis pembertonii (Orchidaceae, Pleurothallidinae), a new species from northwestern Ecuador in the Tropical Andes Biodiversity Hotspot. PhytoKeys, 276, 297-312. https://doi.org/10.3897/phytokeys.276.190930

Image Credits: AI Generated

DOI: 10.3897/phytokeys.276.190930

Keywords: Pleurothallis, pembertonii, Orchidaceae, Pleurothallidinae, species, northwestern, Ecuador, Tropical, Andes, Biodiversity, Hotspot, scientific research

The mismatch between who visits and who actually pollinates is one of the most striking patterns to emerge from the study. Across 73 recorded visitation events on Calanthe discolor, flies in the order Diptera made up the bulk of the traffic, yet not a single fly or butterfly left the flowers carrying pollinaria. This pattern illustrates a central challenge in food-deceptive pollination systems: attracting visitors is relatively easy, but converting visits into pollen transfer is not. In deceptive orchids, insects that land on flowers expecting a reward quickly learn or simply fail to make the deep, sustained probing movements needed to contact the reproductive structures. The orchid’s pollinaria, with their sticky adhesive pads, attach only when an insect pushes deep into the floral spur, and shallow or brief visits simply do not produce that contact.

The bees that did carry pollinaria on C. discolor — the mining bee Andrena opacifovea, the Asian honeybee Apis cerana, the small carpenter bee Ceratina japonica and the sweat bee Lasioglossum formosae — represent a taxonomically diverse set of hymenopterans rather than a single specialised partner. This breadth matters for the orchid’s ecology. Generalised food deception, in which a plant mimics the general signals of rewarding flowers without imitating any specific model species, tends to attract a broad but inefficient visitor pool. The Korean observations fit this model well: many insects came, few carried pollen, and the effective pollinators were medium-to-large bees capable of probing deeply into the spur. This aligns with earlier work in Japan and China, where carpenter bees, long-horned bees, bumblebees and sweat bees have been documented as the principal pollinators of various Calanthe species.

Food deception is widespread among orchids and carries well-documented ecological consequences. Because visitors receive no reward, they tend to learn to avoid the deceptive flowers after one or a few unrewarded encounters, which typically depresses visitation rates and fruit set compared with rewarding plants. Deceptive orchids compensate in various ways — through variability in floral display, through exploiting newly emerged or naive insects, and through the sheer longevity of individual flowers, which can remain receptive long enough to accumulate rare effective visits. The low frequency of pollinaria-carrying visitors recorded in the Korean study is consistent with this broader picture: even during peak flowering on clear, sunny days chosen specifically to maximise insect activity, effective pollinator visits were rare events.

The single observation on C. striata is scientifically significant precisely because it is so sparse. One visitation event by the long-horned bee Eucera nipponensis, with pollinaria attached to the head and the insect moving between flowers, mirrors findings from Japan where the same species has been recorded pollinating hybrids between C. discolor and C. striata. Head-borne pollinaria are particularly consequential in orchids because their placement determines where pollen can be deposited on the next flower visited. If E. nipponensis forages across both taxa in Korean populations, as the Japanese evidence suggests it might, then pollen could move between the species, creating opportunities for hybridisation. This is a testable hypothesis rather than a demonstrated fact — the authors are careful to frame it that way — but it provides a concrete direction for future fieldwork involving more sites, longer observation windows and multiple flowering seasons.

The question of pollinator sharing carries real evolutionary weight. Closely related orchid taxa flowering in sympatry face a fundamental tension: shared pollinators can facilitate gene flow that erodes species boundaries, while pollinator partitioning can reinforce reproductive isolation. In orchids, where hybridisation is a well-known evolutionary force, the identity and behaviour of pollinators can therefore shape whether closely related species remain distinct or blend together. Korean botanical literature has long treated C. striata as a putative natural hybrid of C. discolor and C. sieboldii, and the two focal taxa of this study occur together on Jeju Island, where C. striata shows extensive morphological variation. Genetic work has already established that C. discolor and C. striata are closely related. Documenting which insects actually transport pollinaria between them is thus an essential first step toward understanding the reproductive dynamics of this system in Korea.

The fieldwork itself reflects the practical realities of studying pollination in shaded forest understoreys. Both study sites — a mixed forest on Anmyeon Island on the west coast and dense Japanese cedar stands at Darangswi Oreum on Jeju Island — shared a dense canopy that produced a shifting mosaic of sunflecks on the forest floor. Because insect activity tracks these ephemeral patches of light and warmth, the four trained observers moved continuously between orchid patches rather than remaining fixed at single plants. The surveys were timed to peak bloom, defined as the point when more than half the florets on each raceme were open, and conducted over twelve-hour spans from morning to evening on clear days in late April and early May, when ambient temperatures hovered around 15 degrees Celsius. Capturing insects only as they departed the inflorescences minimised disturbance, and every specimen was later re-examined under a stereomicroscope to confirm the presence or absence of pollinaria, with voucher specimens deposited at the Korea National Arboretum.

One methodological caveat deserves attention: because visitors were not individually marked and not all could be captured, the counts represent visitation events rather than unique individuals, and the same insect may have been recorded more than once. This is a standard and honest limitation of field pollination studies, but it means the true number of visiting insects could differ from the raw event counts. Similarly, a single season at two sites cannot capture the full temporal and geographic variation in pollinator assemblages, which is precisely why the authors present their results as baseline evidence and hypothesis-generating observations rather than definitive conclusions about pollinator identity across the Korean range of these orchids.

The conservation context adds urgency to this line of research. Calanthe species are prized ornamentals, and overcollection combined with habitat destruction has driven declines in wild populations, placing some species at risk. In South Korea, seven Calanthe species are recorded, and several carry formal conservation designations: C. aristulifera is listed as a Class II Endangered Wildlife species, while C. reflexa and C. sieboldii are classified as Endangered in the Korean National Red List. These orchids are largely restricted to the understorey of evergreen broad-leaved forests on the southern coastal islands and Jeju Island, where a mild oceanic climate prevails — habitats that are themselves limited and increasingly fragmented. Although artificial propagation techniques have been developed to support ex situ conservation, reintroduced or managed populations ultimately depend on natural pollination for long-term persistence. Understanding which insects actually move pollen, and under what conditions, is therefore not merely an academic question but a practical prerequisite for effective conservation planning.

The study also highlights how much basic pollination ecology remains undocumented even in well-studied temperate regions. Prior to this work, field data on floral visitor assemblages and pollinaria transport in wild Korean Calanthe populations were essentially absent, with only one recent field-based study of C. aristulifera providing a domestic point of comparison. The genus Calanthe comprises roughly 200 species of perennial terrestrial orchids distributed across Africa, Madagascar, China, Japan, tropical Asia and Australia, and only about eight species are known to self-pollinate, leaving the vast majority dependent on cross-pollination by animals. For most of these species, the identity of effective pollinators remains unknown or inferred from a handful of observations. Each regional study, such as this one, fills in a piece of that global picture while revealing how locally variable pollinator assemblages can be.

Looking forward, the framework established here suggests several productive avenues. Broader temporal sampling across multiple flowering seasons would reveal whether the bee-dominated pollinaria transport seen in 2025 is consistent year to year or reflects the particular conditions of a single spring. Population-level replication across the scattered island and coastal habitats where Korean Calanthe occur would show whether pollinator sharing between C. discolor and C. striata is geographically widespread or restricted to sites of sympatry such as Jeju Island. Direct tracking of pollen movement, whether through marked pollinaria or genetic paternity analysis, could confirm whether Eucera nipponensis and other shared visitors actually mediate gene flow between the taxa. And because the dataset underpinning the study has been deposited with the Global Biodiversity Information Facility, other researchers can independently examine and build upon the occurrence records. In the meantime, the study delivers a clear and useful message: in these deceptive Korean orchids, abundance of visitors is no measure of reproductive success, and the fate of each flowering season rests on the behaviour of a small, select guild of bees.

Subject of Research: Floral visitors and potential pollinators of the deceptive orchids Calanthe discolor and Calanthe striata in South Korea

Article Title: Floral visitors and potential pollinators of Calanthe discolor and C. striata in South Korea

Article References: Han, G. Y., Euo, S.-S., Son, S., Lee, H.-S., Choi, K., & Kim, C.-J. (2026). Floral visitors and potential pollinators of Calanthe discolor and C. striata in South Korea. Biodiversity Data Journal, 14, Article e201540. https://doi.org/10.3897/bdj.14.e201540

Image Credits: AI Generated

DOI: 10.3897/BDJ.14.e201540

Keywords: Calanthe discolor, Calanthe striata, food-deceptive orchids, pollination ecology, pollinaria transport, Eucera nipponensis, bees, South Korea, Orchidaceae, field observation, pollinator sharing, biodiversity

The study, published in the journal Neotropical Biology and Conservation, set out to answer a deceptively simple question: what reproductive phenological events and floristic composition characterise the flowering plants of a peri-urban forest fragment in the Colombian Andes? Phenology, the study of the timing of biological events such as flowering and fruiting, is far more than botanical bookkeeping. In tropical ecosystems, the timing of these events determines when nectar, pollen and fruits become available, and that temporal availability sustains the plant–animal interactions on which entire communities depend. Roughly 90 percent of tropical woody plants rely on pollinators and seed dispersers to complete their reproductive cycles, so shifts in phenological timing can ripple through food webs in ways scientists are only beginning to understand.

The fieldwork was exhaustive in its own understated way. Between January and September 2025, the team conducted two monthly field walks covering every zone of the fragment, deliberately avoiding fixed plots or quadrats in order to maximise spatial coverage and capture as many reproductive events as possible. The focus fell on fertile individuals, those bearing flowers or fruits, because reproductive structures are essential for reliable taxonomic identification in many flowering plant groups. Sterile individuals were also recorded when vegetative characters allowed identification. For each species, between two and four fertile specimens were collected, pressed and processed at the CAUP Herbarium of the University of Cauca, where identification was confirmed through comparison with reference collections and taxonomic databases such as Plants of the World Online and Tropicos.

The inventory yielded 68 fertile species belonging to 31 angiosperm families. Of these, 28 species, or 41.17 percent, were identified to the species level, 38 to the genus level and two morphospecies only to the family level, a common constraint in taxonomically complex tropical groups. Three families dominated the richness rankings. Orchidaceae, the orchid family, led with 11 species, accounting for 16.18 percent of the recorded flora. Rubiaceae, the coffee family, followed with eight species, and Araceae, the arum family, contributed six. Together these three families made up more than a third of the fragment’s recorded floristic richness. The genera Palicourea and Anthurium each boasted five species, the highest generic diversity in the sample.

The growth-form profile of the forest tells its own story. Herbs were the dominant habit with 21 species, or 30.88 percent, closely followed by shrubs with 20 species at 29.41 percent. Epiphytes, plants that perch on trees without parasitising them, accounted for 17 species, a striking 25 percent of the total. Trees, by contrast, made up only 7.35 percent. This composition, rich in fast-growing herbs and shrubs but comparatively poor in large trees, suggests the fragment is in an intermediate stage of ecological succession, regenerating after past disturbance. The authors are careful to note that this interpretation rests on floristic composition rather than direct structural measurements such as trunk diameter or canopy density. Still, the pattern fits classical succession theory, in which disturbed systems are first colonised by short-lived pioneers that are gradually replaced by longer-lived, slower-growing species.

Perhaps the most consequential finding concerns conservation status. All 28 species identified to the species level were confirmed as native to Colombia, and 15 of the recorded species appear on national or global threat lists. The standout is Quercus humboldtii, the Andean oak, classified as Vulnerable at the national level under Colombia’s 2024 environmental resolution, although the IUCN considers it of Least Concern globally. The presence of this species in a peri-urban fragment is remarkable given that Andean oak forests have lost nearly 60 percent of their cover, largely to logging and agricultural expansion. Other notable residents include Alchornea latifolia and Aiouea montana, tree species of conserved environments, and Monotropa coccinea, an entirely mycoheterotrophic plant that depends on underground fungal networks linked to forest trees, a living indicator of shaded, relatively well-preserved forest conditions.

The phenological monitoring produced 197 recorded occurrences across 19 observation campaigns, and the statistical analysis revealed sharply different dynamics for flowering and fruiting. Flowering proved strongly seasonal. A Rayleigh test, a form of circular statistics used to detect whether events cluster in particular parts of an annual cycle, returned a highly significant result, indicating a non-uniform temporal distribution. A seasonality index of 0.347 confirmed moderate concentration, and a Kruskal–Wallis test found significant differences among months. Flowering peaked dramatically in March, when 34 species, half of the entire flora, were in bloom, followed by April with 25 species and September with 20. Fruiting told a different story: it lacked significant circular seasonality, with a lower index of 0.235, suggesting a more homogeneous spread through time, though it too fluctuated significantly by month and peaked in September, when 15 species, 22.1 percent of the flora, carried fruit.

Those temporal patterns map intriguingly onto the local climate. Data from a monitoring station 1.19 kilometres from the site, part of the IDEAM-ENANDES Community Monitoring project, recorded an average annual temperature of 18.4 degrees Celsius and total precipitation of 1,831.1 millimetres for 2025, with a bimodal rainfall regime typical of the Cauca River Basin. Flowering concentrated in March and April, months of relatively high precipitation, while fruiting clustered in September as conditions turned drier. The researchers interpret this cautiously: flowering may be associated with greater water availability, whereas fruiting during drier periods could favour dispersal and seedling establishment. Importantly, no formal correlation or regression analysis was performed to test the climate–phenology relationship, so the association remains descriptive rather than statistically demonstrated.

At the species level, the monitoring revealed a functional backbone for the ecosystem. Vismia baccifera, Besleria solanoides and Psychotria carthagenensis maintained prolonged flowering and fruiting across multiple months, providing a continuous supply of nectar and fruits for pollinators and frugivores. Vismia baccifera and Palicourea species sustain mutualistic relationships with bees, wasps, bumblebees and butterflies, while Siparuna aspera deploys floral adaptations that attract cecidomyiid flies as efficient pollinators. The steady resource supply these persistent species provide makes them key functional components of forest regeneration. By contrast, several species, including Xanthosoma, Comparettia and Pavonia schiedeana, recorded no flowering at all during the nine months, and most orchids, including Stelis, Oncidium, Lepanthes and Rodriguezia, showed no fruiting. Such absences may reflect non-annual reproductive cycles, pollination limitation, fertilisation failure or the abortion of reproductive structures, patterns well documented in Neotropical flora.

The broader message is that peri-urban forests are not passive remnants awaiting development but functional ecosystems actively sustaining ecological processes. The La Claridad fragment, with its sensitive epiphytic orchids serving as bioindicators of habitat quality, its vulnerable Andean oak, and its staggered reproductive calendar, functions as a biodiversity refuge, a biological corridor and a node of connectivity within Popayán’s urban matrix. The authors recommend that future work add structural measurements such as canopy cover and trunk diameter, extend monitoring over multiple years, and integrate data on pollinator and frugivore abundance to track how these communities respond to climate change and fragmentation. As Andean landscapes continue to be carved up by agriculture and urban growth, studies like this one make the case that even small forest fragments on the city’s edge deserve a central place in conservation planning, not as afterthoughts but as living infrastructure for the region’s ecological future.

Subject of Research: Reproductive phenology and floristic composition of a peri-urban Andean forest fragment in Popayán, Colombia

Article Title: Reproductive phenology and floristic composition of a peri-urban forest fragment in the Colombian Andes

Article References: Majin-Quiñonez, N., Luligo-Miranda, S., Zambrano-Gonzales, G., & Becoche-Mosquera, J. (2026). Reproductive phenology and floristic composition of a peri-urban forest fragment in the Colombian Andes. Neotropical Biology and Conservation, 21(2), 189-212. https://doi.org/10.3897/neotropical.21.e181931

Image Credits: AI Generated

DOI: 10.3897/neotropical.21.e181931

Keywords: phenology, peri-urban forest, Colombian Andes, floristic inventory, Orchidaceae, flowering, fruiting, ecological succession, biodiversity conservation, Quercus humboldtii, pollinators, climate seasonality

The research focused on one of the most species-rich families of flowering plants on Earth: the Orchidaceae, which comprises 29,524 species found on every continent except Antarctica. Brazil alone is home to an estimated 2,692 native orchid species, roughly 1,490 of them endemic, making the family the second most diverse flowering plant group in the country after the legumes. Yet many of these species remain poorly studied, and habitat loss combined with collection for trade continues to threaten them. Because orchid seeds lack sufficient nutrients to germinate on their own, every wild orchid depends on symbiotic fungi to complete its life cycle, making the fungi associated with orchid roots a matter of both ecological urgency and scientific fascination.

While the mycorrhizal partners that feed orchid seedlings have received considerable attention, a different class of fungal guests, the endophytes, colonize root tissues without causing disease and often without any visible symptoms. These fungi, mostly ascomycetes, can confer real benefits to their hosts, including promotion of plant growth, resistance to pathogens, and tolerance of abiotic stress, while they themselves receive shelter and nutrients from the plant. Previous surveys of orchid endophytes, however, relied heavily on sequencing just the internal transcribed spacer (ITS) region of ribosomal DNA, a marker now recognized as too coarse to distinguish closely related fungal species. That limitation left the true identity of chaetomium-like fungi in orchid roots largely unresolved.

The new study took a different approach. Working as part of the Brazilian PROTAX research program, the team sampled the roots of twelve wild orchid species spanning epiphytic, lithophytic, and terrestrial lifestyles, including familiar genera such as Cattleya, Catasetum, Habenaria, Zygopetalum, Acianthera, Eulophia, Polystachya, Gomesa, Cyclopogon, and others. Collections spanned four states: Distrito Federal, Goias, Minas Gerais, and Rio de Janeiro. Using indirect isolation and dilution-to-extinction cultivation methods, plus direct isolation of fungal structures from the coconut shell substrate used to grow one Cattleya species, the researchers obtained 44 root endophyte isolates, three saprophytic isolates from the substrate, and four additional strains including endophytes from banana and cacao roots that proved closely related to their orchid finds.

Each isolate was then subjected to a polyphasic analysis combining colony growth on four standardized culture media with detailed micromorphology of ascomata, ascomatal hairs, asci, ascospores, and asexual structures, and DNA sequencing of four loci: ITS, the 28S large subunit (LSU), beta-tubulin (tub2), and the RNA polymerase II second-largest subunit (rpb2). Because ITS and LSU have limited resolving power at the species level in this family, the protein-coding genes tub2 and rpb2 were amplified first for all isolates, providing the resolution needed to recognize species boundaries. Bayesian inference and maximum-likelihood phylogenies were constructed, and candidate new species were delimited using the Genealogical Concordance Phylogenetic Species Recognition framework, which demands consistent evolutionary signal across multiple independent loci.

The results were striking. The 51 isolates belonged to six genera: Arcopilus, Chaetomium, Collariella, Dichotomopilus, Humicola, and Pseudohumicola. Arcopilus proved the most diverse, with 21 isolates and eight species, four of them new: A. abbreviatus and A. endophyticus, both from the terrestrial orchid Habenaria petalodes; A. kasuyae, from the lithophytic Acianthera teres and named in honor of Brazilian microbiologist Maria Catarina Megumi Kasuya, a pioneer of orchid-fungus research in Brazil; and A. singularis, from Cattleya locatellii. Two of these new Arcopilus species are morphologically aberrant: A. endophyticus forms sterile colonies with coiled, melanized hyphae and no reproductive structures, while A. singularis produces an acremonium-like asexual morph never before documented in the genus.

The remaining new species spanned four other genera. Collariella fluminensis, found in the roots of Cyclopogon congestus and Eulophia maculata in Rio de Janeiro and Minas Gerais, was the only new species recovered from two different host plants. Dichotomopilus brasiliensis was isolated from Zygopetalum mackayi and, notably, also from banana and cacao roots, hinting at a broad host range. Three new Humicola species emerged: H. capillata from the Cerrado in the Distrito Federal, and H. paraisoensis and H. purpurea, the latter named for its striking purple pigment, from Atlantic Forest sites in Minas Gerais. Finally, Pseudohumicola crispata, recovered from a lithophytic Cattleya, is the first species of its genus anywhere in the world to be described from an endophytic association.

The phylogenetic data also forced two taxonomic reckonings. Chaetomium albiziae, described only recently as an endophyte of Albizia lebbeck, clustered consistently within the C. cucumericola clade, with pairwise sequence identities of about 99 percent across ITS, tub2, and rpb2 and only negligible single-nucleotide differences. Because the original description of C. cucumericola was based on a sterile isolate, the sexually reproducing C. albiziae effectively supplies that species’ missing sexual morph, and the authors formally synonymized the two names. A parallel conclusion placed Arcopilus albae under A. cupreus, since the former differed from the reference strain of A. cupreus by only two single-nucleotide mutations and was morphologically indistinguishable. By contrast, Chaetomium microthecium, which sometimes nests inside the broad C. globosum complex in some gene trees, was deliberately retained as a distinct species pending a comprehensive revision of that complex.

Beyond the novelties, the study delivered a cascade of first records. Arcopilus aureus, the type species of its genus, and A. cupreus were both documented as orchid endophytes for the first time, as was A. macrostiolatus, previously known from Nigerian forest soil. Chaetomium coarctatum, C. cochliodes, C. pseudocochliodes, and C. tenue were all newly recorded for Brazil and as orchid endophytes, while Dichotomopilus variostiolatus was reported for the first time inside orchid roots. Two previously known Pseudohumicola species gained richer descriptions: the acremonium-like synanamorph of Ps. cinnamomeobrunnea, originally described from volcanic soil in the Canary Islands, and the sexual morph of Ps. pulvericola, originally found in house dust in Mexico, which revealed itself as homothallic when cultivated on oatmeal agar under a sterile paper filter.

The broader significance is twofold. Ecologically, the findings reveal that chaetomium-like fungi form complex communities inside wild orchid roots across three different plant lifestyles and two major Brazilian biomes, even though the precise function of these associations remains unclear. Economically, Chaetomiaceae are already prized for degrading cellulose-rich substrates and producing secondary metabolites with agricultural, pharmaceutical, and industrial applications, and endophytic Arcopilus and Humicola isolates have shown antifungal, antibacterial, antioxidant, and pigment-producing capabilities. With only 22 species identified here from limited sampling, almost half of them new to science, the study makes a vivid case that Brazil’s orchid roots are a frontier of fungal discovery, and that taxonomic exploration of these partnerships is the essential first step toward understanding them and harnessing their potential.

Subject of Research: Diversity and taxonomy of endophytic Chaetomiaceae fungi associated with roots of wild Brazilian orchids

Article Title: Diversity and taxonomy of endophytic Chaetomiaceae ( Sordariales ) associated with roots of wild Orchidaceae in Brazil

Article References: Ramos, D. O., Nogueira, P. T. S., Condé, T. O., dos Santos Santana, J., & Pereira, O. L. (2026). Diversity and taxonomy of endophytic Chaetomiaceae (Sordariales) associated with roots of wild Orchidaceae in Brazil. IMA Fungus, 17, Article e192047. https://doi.org/10.3897/imafungus.17.192047

Image Credits: AI Generated

DOI: 10.3897/imafungus.17.192047

Keywords: Chaetomiaceae, endophytic fungi, Orchidaceae, Brazil, taxonomy, new species, multigene phylogeny, Atlantic Forest, Cerrado, mycology, Arcopilus, Chaetomium

The effort builds on a cartographic tradition that stretches back almost half a century. The first map of Italian floristic knowledge was released in 1978, and a second edition followed in 2005. To create the new version, the researchers compiled a bibliographic catalogue of 3,423 scientific articles and 479 books or book chapters, organized by administrative region. Each reference was manually georeferenced to a polygon delimiting the spatial extent of the area it covered, using vector cartography from the Italian National Geoportal and toponyms drawn from the 1:25,000 topographic map series of the Italian Military Geographic Institute. The team adopted the same five-level classification system used in 2005, ranging from virtually unknown areas to well-known areas, allowing a direct comparison of knowledge across three benchmark years: 1978, 2005 and 2025.

To quantify progress objectively rather than relying on anecdotal impressions, the researchers introduced a new metric: the Index of Floristic Knowledge Advancement, or IFA. This index measures the proportion of maximum potential progress that each region has actually achieved between 2005 and the ideal state of complete knowledge, expressed as a normalized value between 0 and 1. Values are categorized as limited, moderate, high or very high. Crucially, all analyses were based on regional percentage distributions rather than absolute areas, ensuring that small regions could be compared fairly with large ones. At the national scale, the IFA was just 0.22 when comparing 1978 with 2005, but rose to 0.30 when comparing 2005 with 2025, a signal that the pace of discovery has accelerated even as the easiest gains have already been made.

The regional rankings tell a striking story. Emilia-Romagna emerged as the most comprehensively documented region in Italy, with an IFA of 0.81, the only region to reach the very high category. Its area classified as well-known soared from 26.52 percent to 82.01 percent over the two decades. Lombardia followed with 0.60, then Friuli-Venezia Giulia at 0.54, and Trentino-Alto Adige and Veneto tied at 0.53. In central Italy and the islands, Lazio scored 0.50, Sardegna 0.45 and Toscana 0.36. Trentino-Alto Adige deserves special mention for sheer data volume: the number of floristic records there jumped from 897,000 in 2005 to 2,191,000 in 2025, driven by two ongoing mapping projects, one for the province of Bolzano and one for the province of Trento.

The drivers of this acceleration are diverse. Coordinated scientific projects, citizen science programs, the development of digital databases such as the Wikiplantbase platforms, and a renewed focus on taxonomic research all played a role. In Piemonte, a collaborative mapping programme gathered more than 790,000 georeferenced records by 2021, most of them collected in the last two decades, while the annual series Note floristiche piemontesi has published over 1,350 records since 2005. In Toscana, the companion series Contributi per una flora vascolare di Toscana has added more than 1,200 records since 2009, and the monumental Flora Analitica della Toscana, published between 2016 and 2021, synthesized the region’s vascular flora in eight volumes. In Emilia-Romagna, a decade-long mapping project launched in 2016 has compiled over 200,000 bibliographic and original field records for the Romagna biogeographical region.

The discovery of new species has been equally impressive. Between 2005 and 2025, a total of 579 new names were published based on material collected in Italy, of which 126, roughly 22 percent, were later synonymized with previously described taxa. The remaining 453 accepted taxa include 291 species and 162 subspecies, and 443 of them are Italian endemics. Abruzzo leads the regional count with 74 newly described taxa, followed by Sicilia with 69, Toscana with 53 and Sardegna with 51. The genus Hieracium, the hawkweeds, dominates the list with 147 taxa, followed by the orchid genera Ophrys with 33 and Epipactis with 29, and the dandelion genus Taraxacum with 26. By family, Asteraceae accounts for 195 of the new taxa, with Orchidaceae contributing 44.

Yet the numbers also expose a structural weakness in Italian botany. The vast majority of publications, 2,931 of them, focus on small areas within a single region, while only 95 works cover at least 18 regions and a mere 2.43 percent address the national scale. Research effort is also geographically skewed: Sardegna, with 916 references, and Piemonte, with 784, together account for nearly a third of the total, while Basilicata, Friuli-Venezia Giulia, Molise, Umbria and Valle d’Aosta each attracted about 300 references or fewer. The Orchidaceae family, beloved of amateur botanists, generated the most studies of any plant family, with 425 references representing 10.8 percent of the total output.

The north-south divide is the study’s most sobering finding. While northern regions surged ahead, progress in the south and on the islands was markedly slower. Calabria and Sicilia exhibited near-stagnation, with minimal advancement into the highest knowledge categories, and Basilicata, Molise and Umbria remained largely at intermediate levels with little change over two decades. Virtually unknown areas still persist in central-western Abruzzo, Campania, Puglia, Basilicata and Calabria, and large areas with only generic knowledge are concentrated in Liguria, Umbria, southern Abruzzo, northern Campania, northern Puglia, central Basilicata, central Calabria and central Sicilia. This is paradoxical given that much of the fieldwork organized by the Italian Botanical Society’s floristic working group was deliberately concentrated in southern Italy, yet these regions showed only modest improvements in documentation.

The analysis of newly published names also reveals instructive patterns about how taxonomy gets done. The 147 Hieracium names are almost exclusively the work of a single researcher, Günther Gottschlich, collaborating with local collectors. Among orchids, a group heavily studied by amateurs, the rate of synonymy is strikingly high: more than 45 percent of the 81 described names, 37 in total, are now considered synonyms. The authors argue that this contrast demonstrates a key lesson, namely that synergistic collaboration between professional and amateur taxonomists is essential for producing reliable and durable taxonomic hypotheses. In Sicilia, most of the 69 new species and subspecies described resulted from critical re-evaluation of previously known plants rather than genuine discoveries in under-explored areas, a reminder that naming is not the same as knowing.

Why does all this matter beyond the herbarium? Floristic knowledge, the authors contend, is a foundational, long-term investment and a cumulative record built through generations of fieldwork, and even a small floristic contribution is an essential component of global biodiversity knowledge, supporting taxonomic, biogeographic, evolutionary and conservation research. It is also a legal necessity: protected area managers rely on these baseline data to comply with monitoring obligations under Article 11 and reporting duties under Article 17 of the European Habitats Directive. Without a rigorous knowledge baseline, the researchers warn, advanced studies risk being erected on unstable ground, compromising the integrity, reproducibility and long-term value of the entire scientific enterprise. The message of the new map is clear: Italy knows its northern flora better than ever, but achieving a truly comprehensive picture of the country’s extraordinary plant diversity will require targeted fieldwork, sustained investment and far greater collaboration in the regions that time and funding have left behind.

Subject of Research: Twenty-year mapping of floristic knowledge advancement across the administrative regions of Italy

Article Title: Mapping the advancements in floristic knowledge of Italy (2005–2025)

Article References: Domina, G., Bacchetta, G., Bartolucci, F., D’Antraccoli, M., Peruzzi, L., Stinca, A., Alessandrini, A., Bernardo, L., Boscutti, F., Bouvet, D., Bovio, M., Calvia, G., Cambria, S., Conti, F., Dagnino, D., Del Guacchio, E., Galasso, G., Gigante, D., Di Gristina, E., … Barone, G. (2026). Mapping the advancements in floristic knowledge of Italy (2005–2025). Plant Biosystems, 160(4), Article 213. https://doi.org/10.1007/s44473-026-00207-4

Image Credits: AI Generated

DOI: 10.1007/s44473-026-00207-4

Keywords: floristics, Italy, vascular flora, biodiversity, endemism, plant taxonomy, biogeography, citizen science, Hieracium, Orchidaceae, conservation, floristic mapping