Cycad Biology and Conservation: 9th Intl Conference on Cycad Biology. Mem (117) intermountain This revision of the genus

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

and on Hispaniola

The Vascular Cryptogams and the Gymnosperms

It is the first fully illustrated flora of liverworts and hornworts for any part of the Neotropics

The plants in this grouping are mostly monopodial or sympodial woody plants with monomorphic or dimorphic branch-systems

Cycad Biology and Conservation: 9th Intl Conference on Cycad Biology. Mem (117) intermountain This revision of the genusAncient in origin and once widespread on Earth, today cycads comprise few living survivors in limited distributions in the tropics and subtropics. A study of these extant members and the cycad fossil record dating back to over 250 million years ago has revealed that cycads have remained relatively unchanged throughout their long history. Indeed, cycads are the sister group to all other extant seed groups, and an understanding of their evolution can