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Slider Images from: Cycad Biology and Conservation: The 9th International Conference on Cycad Biology.
Edited by Nan Li, Dennis Wm. Stevenson, and M. Patrick Griffith.
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AbstractSTEVENSON, D. W. (New York Botanical Garden, Bronx, New York 10458, USA), A. MORETTI, and P. DE LUCA (Dipartimento di Biologia Vegetale, via Foria 123, Napoli 80139, Italia). A new species of Encephalartos (Zamiaceae) from Tanzania. Memoirs of The New York Botanical Garden 57: 156–161. 1990. Encephalartos sclavoi, a new species from Central Africa, is a member of a group of species containing E. bubalinus, E. gratus, E. hildebrandtii, E. tegulaneus, and E. voiensis. Encephalartos sclavoi is most closely related to E. voiensis from which it differs in vegetative and reproductive characters and habitat preference.
Keywords: Encephalartos, Tanzania, leaflet characters
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Dennis William Stevenson holds a Ph.D. University of California, Davis 1975. He is Vice President for Laboratory Research at The New York Botanical Garden and Editor, Botanical Review. His expertise is in Cycads, Monocots, and Genomics. His major research interests in the past few years have focused upon the evolution and classification of the Cycadales (cycads) and their placement in seed plant phylogeny. He is conducting research on various facets of the biology of the Cycadales and Gnetales. These facets include reproductive biology, anatomy, cytology, molecular systematics, as well as taxonomic monographs and treatments of these groups for various floras being prepared for the neotropics. Another major research interest is the systematics of the monocots, particularly, the Commelinidae. The topics under investigation include developmental floral morphology, embryology, and inflorescence structure because this basic information is incomplete or unknown for many of these families. These data are being combined with gene sequence data to generate phylogenetic hypothesis on the origin and classification of the monocots. Dennis Wm. Stevenson's Author Page