A Monograph of the Mexican and Cental American Species of Trixis. Mem (22)3 intermountain Chimarrhis

Chimarrhis

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

but he scarely left his home town of Hurstpierpoint

with Comments on Its Biogeograhic Significance

A New Species of Encephalartos (Zamiaceae) from Northeastern Zaire

A Monograph of the Mexican and Cental American Species of Trixis. Mem (22)3 intermountain ChimarrhisAll 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