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Issue: Vol. 649 No. 1: 16 May 2024
Type: Article
Published: 2024-05-16
DOI: 10.11646/phytotaxa.649.1.7
Page range: 111-120
Abstract views: 88
PDF downloaded: 6

A new species of Polystemma (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobineae) from the state of Oaxaca, Mexico

Departamento de Biología Comparada, Laboratorio de Plantas Vasculares, Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 70-282, 04510, Ciudad de México, México
Universidad Nacional Autónoma de México, Instituto de Biología, Jardín Botánico. Tercer circuito exterior de Ciudad Universitaria, Coyoacán, 04510 Ciudad de México, México
Universidad Nacional Autónoma de México, Instituto de Biología, Jardín Botánico. Tercer circuito exterior de Ciudad Universitaria, Coyoacán, 04510 Ciudad de México, México
Departamento de Biología Comparada, Laboratorio de Plantas Vasculares, Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 70-282, 04510, Ciudad de México, México
Biodiversity Endemic species Flora of Oaxaca Gentianales gypsophylic Eudicots

Abstract

We describe a new species of Polystemma endemic to Oaxaca, Mexico. Polystemma leopardum is similar to P. cordatum but differs in the shape of the corolla lobes, flower color pattern, shape of the gynostegial corona and stylar head, as well as its specialized habitat. We describe and discuss its morphology and provide illustrations and a distribution map. We propose its conservation status as Endangered under the criteria of the IUCN. This discovery increases the diversity of the genus in the country to ten species.

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