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

A New Species of Encephalartos (Zamiaceae) from Northeastern Zaire

Also included are in-depth discussions of the family's morphology

Developed across 15 years of practical classroom experience by a gifted teacher in the Boston Public School System

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

a tireless scholar

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