A Monograph of the Mexican and Cental American Species of Trixis. Mem (22)3 intermountain Many previously described taxa are

Many previously described taxa are reduced to synonymy

and cites works redescribing or discussing Murrill's taxa

This revision of the genus Ceratolejeunea in Tropical America recognizes 23 species in two subgenera

with Comments on Its Biogeograhic Significance

containing many widespread and/or common species for which numerous collections have been examined and listed

A Monograph of the Mexican and Cental American Species of Trixis. Mem (22)3 intermountain Many previously described taxa areAll of the species treated in this volume are frutescent perennials with horizontal underground stems. The genus Trixis of the Compositae (tribe Mutisieae, subtribe Nassauviinae) has two centers of diversity, one in southwestern Mexico and one in the area of northern Argentina, Uruguqy, and southern Brazil. The genus has never been studied as a whole. The two groups come into contact only in southern Central America and in the West Indies, where the