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Issue: Vol. 670 No. 4: 5 Nov. 2024
Type: Article
Published: 2024-11-05
DOI: 10.11646/phytotaxa.670.4.1
Page range: 191-202
Abstract views: 169
PDF downloaded: 117

Quercus purhepecha (Fagaceae), a new species of shrub oak endemic to the state of Michoacán, Mexico

Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, 58190 Morelia, Mexico. Posgrado en Ciencias Biológicas, Unidad de Posgrado, Edificio A, 1° Piso, Circuito de Posgrados, Ciudad Universitaria, Coyoacán, 04510 Mexico City, Mexico.
Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, 58190 Morelia, México
Escuela Nacional de Estudios Superiores Unidad Morelia, Universidad Nacional Autónoma de México. Antigua Carretera a Pátzcuaro No. 8701 Col. Ex Hacienda de San José de la Huerta, C.P. 58190, Morelia, Michoacán, Mexico
Red de Biología Evolutiva, Laboratorio de Bioclimatología, Instituto de Ecología, A.C., Carretera antigua a Coatepec 351, 91073, Xalapa, Veracruz, Mexico
Herbario y Jardín Botánico. Benemérita Universidad Autónoma de Puebla. Av. San Claudio s/n C.P. 72590 Puebla, Puebla, Mexico
Herbario de la Facultad de Ciencias, Departamento de Biología Comparada, Universidad Nacional Autónoma de México, Circuito Exterior, s.n., Ciudad Universitaria, Coyoacán, 04510 Mexico City, Mexico
endemic species shrubby oaks white oaks Eudicots

Abstract

Within the genus Quercus there are species with a shrubby habit that have been little studied worldwide. In Mexico, several shrub species within section Quercus are taxonomically highly problematic. These include eight named taxa that share traits such as abaxially tomentose leaves and growth of stems from one or multiple rhizomes, and there is evidence of additional undescribed species. Here, Quercus purhepecha is described and illustrated as a new tomentose shrubby white oak species, with a very restricted distribution within the Cuitzeo basin in the Trans-Mexican Volcanic Belt (TMVB), Michoacán state, Mexico. This new species is morphologically compared with Q. frutex, Q. microphylla and Q. repanda, which are similar taxa also distributed in the TMVB. In addition, a potential distribution model of Q. purhepecha for the Cuitzeo basin is presented.

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