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Issue: Vol. 712 No. 3: 1 Aug. 2025
Type: Article
Published: 2025-08-01
DOI: 10.11646/phytotaxa.712.3.3
Page range: 255-267
Abstract views: 1109
PDF downloaded: 16

A new species of Polylepis (Rosaceae) from the Oxapampa-Asháninka-Yánesha Biosphere Reserve, Perú

Missouri Botanical Garden. Prolong. Bolognesi Mz. E Lote 6, Oxapampa-Pasco, Perú
Instituto Nacional de Investigación en Glaciares y Ecosistemas de Montaña (INAIGEM), Av. Centenario 2656, Huaraz, Perú
Achene Central Amazonian Peruvian Ecosystem Protected areas Rhytidome Tropical Andes Sericeae Eudicots

Abstract

A new species of Polylepis from the humid Puna in the Oxapampa-Asháninka-Yánesha Biosphere Reserve (BIOAY), Pasco Region, Perú, is described and illustrated. This species was found between 3700–3850 m elevation, on Rocky Mountains, in small patches or relict forests of the buffer zone of Yanachaga Chemillén National Park. Polylepis yanesha is similar to P. rocio-rojasii but differs because the leaves have much smaller oblong-elliptic leaflets, the abaxial surface is densely lanuginose with scattered filiform glandular trichomes of golden yellow resin, shorter and thinner petioles, the inflorescence is short, axillary, pendulous, 4.0–8.0 cm long with 5–8 flowers, a greater number of stamens, 17–23; the fruits are much smaller, rounded-ovoid to cylindrical achenes, with short, blunt-tipped spines. We also present details on its geographic distribution, ecological notes, a key to differentiating species of the genus Polylepis sect. Sericeae, a comparative table of characteristics between similar species, and an assessment of the conservation status of the new species.

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How to Cite

Gamarra, L.V. & Espinoza, T.E.B. (2025) A new species of Polylepis (Rosaceae) from the Oxapampa-Asháninka-Yánesha Biosphere Reserve, Perú. Phytotaxa 712 (3): 255–267. https://doi.org/10.11646/phytotaxa.712.3.3