Developmental and Structural Section
Hasenstab, Kristen .
Leaf Anatomy and Trichome Morphology in the genus Varronia (Cordioideae: Boraginaceae: Boraginales).
The genus Varronia (Cordioideae:Boraginales), with ca. 100 species, has largely been thought to have homogenous vegetative features. Anatomical sections of leaves instead reveal that a surprising amount of variation exists,including isobilateral leaves which were have not previously been described in the genus. Additionally, scanning electron microscopy(SEM) revealed a wide range of variation in leaf trichome morphology across species of Varronia. Trichometypes include stellate, muricate, strigulose, glandular and apically hooked. These anatomical and micromorphological characters will provide insights in an evolutionary context toward understanding the diversification of Varronia.Species of Varronia often occur in dry habitats and the genus appears to have radiated across topographically diverse regions of the Neotropics. The structural traits documented here may provide insight into the relationship between habitat and diversification rates
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1 - Rancho Santa Ana Botanic Garden, Research, 1500 N College Ave, Claremont, CA, 91711, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Lindell A/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 3:00 PM