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Issue: Vol. 345 No. 1: 20 March 2018
Type: Article
Published: 2018-03-20
DOI: 10.11646/phytotaxa.345.1.9
Page range: 73–77
Abstract views: 19
PDF downloaded: 3

A new species of Psacalium (Asteraceae, Senecioneae) from the state of Guerrero, Mexico

Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-233, 04510 Ciudad de México, México.
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-233, 04510 Ciudad de México, México. University of California Davis, Plant Biology Graduate Group, One Shields Avenue, 95616, Davis, California, USA.
Instituto de Ecología, A.C. Red de Diversidad Biológica del Occidente Mexicano, Centro Regional del Bajío, Av. Lázaro Cárdenas 253, 61600, Pátzcuaro, Michoacán, México.
Cacalioid Senecioneae Compositae endemism new taxa Sierra Madre del Sur Tussilaginae Eudicots

Abstract

Psacalium villosum is described from the central mountainous region of the state of Guerrero, Mexico. This novelty belongs to the peltate group of Psacalium and is distinguished primarily by its densely villose capitulescence axis and branches. In addition, the capitulescence lacks bracts. The heads are obscurely calyculate, bear up to 44 florets, and have a glandular-stipitate receptacle. Here, we describe and illustrate this new species. We also provide a distribution map and a comparison with similar taxa.