title: A new species ofErythrostemon(Leguminosae, Caesalpinioideae) from the western Río Balsas Depression, Mexico.
abstract: A new legume species from a seasonally dry forest of the Western Río Balsas Depression, in the states of Guerrero and Michoacán, Mexico,Erythrostemon guevarafeferii, is herein described and illustrated. The new species shows morphological affinities withErythrostemon hintonii, from which it is distinguished in having fewer leaflets per pinna, mature leaflets disposed toward the upper half of the pinnae rachises, long inflorescences on curved slender peduncles, abundant red glands on its flowers and inflorescences, and its fruit glabrous with red stipitate glands at maturity. A taxonomic key to the Río Balsas Depression species ofErythrostemonis included.
authors.affiliation: Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México. Circuito Exterior s/n, Ciudad Universitaria, Copilco, Coyoacán. A.P. 70-367 México, Distrito Federal. C.P. 04510.
authors.forename: Solange
authors.initials: S
authors.lastname: Sotuyo
authors.affiliation: Facultad de Arquitectura, Benemérita Universidad Autónoma de Puebla. 4 Sur 104. Col. Centro. CP 72000. Puebla, Puebla.
authors.forename: José Luis
authors.initials: JL
authors.lastname: Contreras-Jiménez
authors.affiliation: Comparative Plant and Fungal Biology Department, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, U.K.
authors.forename: Gwilym P
authors.initials: GP
authors.lastname: Lewis
keywords: Caesalpinia group; Erythrostemon; Fabaceae; Leguminosae; Neotropics