Flicker, Benjamin , Ballard, H. E. .
Systematic revison of the Hybanthus enneaspermus complex (Violaceae) in tropical east Africa and Madagascar.
Hybanthus enneaspermus (L.) F. Muell. is a highly polymorphic species of often “weedy” herbs ranging throughout most of the Old World Tropics. A large amount of the variation is seen in the collections from tropical east Africa. Previous authors have differed in their treatment of this variation. Some have considered all of this variation to be part of a single variety, H. enneaspermus var. enneaspermus while others have split off a small number of species and several varieties, mostly based on vegetative characters. These treatments are all relatively old, the newest being from the 1960’s, and are parts of larger floras. This study aims to be the first to comprehensively study this species complex over the entirety of its range. It is based on examinations of over 1,000 herbarium collections from many of the world’s major herbaria including Kew, Paris, Wageningen, and Missouri. A number of taxa stand out from the typical H. enneaspermus in both vegetative and reproductive morphological features and should be raised to species status. Diagnostic features and geographic ranges of all recognized taxa will be presented.
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1 - Ohio University, Environmental and Plant Biology, Porter Hall, Athens, Ohio, 45701, U.S.A.
2 - Ohio University, Dept. of Environmental & Plant Biology, and Molecular & Cellular Biology Program, 317 Porter Hall, Athens, Ohio, 45701, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Ballroom B/Convention Center
Date: Monday, August 2nd, 2010
Time: 1:30 PM