Farruggia, Frank T. , Bohs, Lynn .
A phylogeny of Solanum sect. Crinitum (Solanaceae) and its relationships within the Leptostemonum Clade.
Solanum sect. Crinitum is a small section of ca. thirteen species within the enormous genus Solanum. It is comprised of small shrubs and large canopy trees found from the Andean cloud forests to the Amazon rainforest and the Brazilian cerrado. The section has received some taxonomic attention but, until recently, has been largely absent from molecular phylogenies. Section Crinitum is most closely related to sect. Androceras within the Leptostemonum clade, or spiny solanums; however, the relationship between these sections has not been clearly defined until now. Section Crinitum is characterized by its large stature as well as the large flowers and fruits in most species. Here we discuss the species and present data that support the traditional species circumscriptions. We also provide morphological characters that relate to the principal lineages within the section and discuss the importance of fruit and trichome morphologies. Our data indicate that section Crinitum contains two main centers of diversity, one in the sub-montane humid forests along the eastern slopes of the Andes and another in eastern Brazil. Restricted species distributions are common in the Andean species while the lowland species are more widely distributed. These distributions are related to orographic and climatic features of the landscape and shed light into the limited or extensive geographic range of each species. These data help to resolve relationships within the large Leptostemonum clade and will aid in taxonomic revisions of species within Solanum section Crinitum.
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1 - University of Utah, Department of Biology, 257 S. 1400 E., Salt Lake City, Utah, 84112, USA
Presentation Type: Oral Paper:Papers for Sections
Location: 556B/Convention Center
Date: Tuesday, August 3rd, 2010
Time: 3:30 PM