Developmental and Structural Section
Horn, James W. , Fisher, Jack B. , Tomlinson, P. Barry , Lewis, Carl .
Palm anatomy, systematics, and evolution: a project working towards a second edition of Anatomy of the Monocotyledons: Palmae.
THE classic book Anatomy of the Monocotyledons: Palmae is undergoing a thorough revision on account of a much better understanding of palm systematics and structural botany since its publication in 1961. Access to the holdings of collaborating botanical gardens allows for nearly all palm genera to be sampled. The objective of the new volume is to document the range of vegetative anatomy of palms, focusing at the generic level, placing these data in a contemporary phylogenetic context. We will present three case studies that highlight new observations and interpretations Sommieria leucophylla possesses neighbor cells surrounding each stomatal complex that are lignified and pitted, a feature uniquely shared with its sister taxon, Pelagodoxa henryana. Tribe Geonomateae (Arecoideae) show a diversity of leaf anatomical characters of systematic significance. A uniseriate, multicellular trichome type that develops from a longitudinal file of epidermal cells is potentially synapomorphic for this clade. Within Coryphoideae, leaf laminae with an isolateral histological configuration have at least 10 independent origins from an ancestrally dorsiventral state. Mature isolateral leaf histology is closely correlated with palms of xeric habitats, and is consistent with observations from molecular developmental studies of Arabidopsis and maize in which dorsiventral lamina polarity is not expressed account of the specification of abaxial pattern formation on both leaf surfaces.
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Palm Biology Research at Fairchild Tropical Botanic Garden
1 - Fairchild Tropical Botanic Garden, Center for Tropical Plant Conservation, 11935 Old Cutler Road, Coral Gables, Miami, Florida, 33156-4242, USA
2 - Fairchild Tropical Botanic Garden, 11935 Old Cutler Rd., Coral Gables, Miami, Florida, 33156-4299
3 - Harvard University, Harvard Forest, Po Box 68, Petersham, Massachusetts, 01366, USA
Presentation Type: Oral Paper:Papers for Sections
Location: 312/Bell Memorial Union
Date: Monday, July 31st, 2006
Time: 4:45 PM