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