An Assessment of the Varieties of Croton glandulosus (Euphorbiaceae) in the United States

Benjamin Van Ee; Paul E. Berry; Steven Ginzbarg

doi:10.3100/025.014.0109

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Benjamin Van Eehttps://orcid.org/0000-0003-2214-7890,¹ Paul E. Berry,² Steven Ginzbarg³

¹Harvard University Herbaria, 22 Divinity Avenue, Cambridge, Massachusetts 02138, U.S.A. E-mail: . Author for correspondence. bvanee@oeb. harvard.edu
²Department of Ecology and Evolutionary Biology and University of Michigan Herbarium, 3600 Varsity Drive, Ann Arbor, Michigan 48108–2287, U.S.A. E-mail: . peberry@umich.edu
³University of Alabama Herbarium, Department of Biological Sciences, University of Alabama, Box 870345, Tuscaloosa, Alabama 35487–0345, U.S.A. E-mail: . sginzbar@biology.as.ua.edu

Abstract

Croton glandulosus is one of the most common and widespread species of the genus. It is a morphologically variable species for which more than thirty varieties have been described. This work provides a critical evaluation of the varieties of C. glandulosus that have been applied to specimens from North America north of Mexico. Five natively occurring varieties are recognized in this region. Several varieties are reduced to synonymy, and the new combination C. glandulosus var. arenicola is made. Lectotypes are designated for those varieties lacking a designated holotype.

Citation Download Citation

Benjamin Van Ee, Paul E. Berry, and Steven Ginzbarg "An Assessment of the Varieties of Croton glandulosus (Euphorbiaceae) in the United States," Harvard Papers in Botany 14(1), 45-59, (1 June 2009). https://doi.org/10.3100/025.014.0109

Published: 1 June 2009

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