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Abstract Detail


Systematics Section/ASPT

Day, Donnie [1], Keene, Jeremy [2], Ballard Jr, Harvey [1].

Confirmation of Diastema vexans within the tribe Gloxinieae (Gesneriaceae).

Diastema vexans H.E. Moore has been identified from central to south Colombia. The nomenclatural past of the species has been very confused due to multiple species being designated under Diastema pictum Regel, a previous name applied to the species. Morphological studies of the species and other plants closely related to Diastema vexans have shown that the name Diastema lehmannii Regel is the correct one for the species in question. These studies have also revealed three new species related to Diastema vexans that are distributed from Colombia southward through Peru. These taxa are identified by a suite of characters including axillary inflorescences, orbicular to ovate calyx lobes, and cup-shaped fruits. These traits are not seen among the other species of Diastema Benth. and this grouping may represent a new genus in the tribe. Recent molecular phylogenies by other researchers show that Diastema vexans is not part of Diastema sensu stricto. Ongoing molecular research will confirm the placement of these species within the tribe Gloxinieae.

Broader Impacts:


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1 - Ohio University, Environmental & Plant Biology, 315 Porter Hall, Athens, OH, 45701, USA
2 - 5588 Fullview Hts Dr, Apt A, Athens, OH, 45701, USA

Keywords:
Diastema
Gesneriaceae
Systematics
South America.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Battelle South/Convention Center
Date: Monday, July 9th, 2012
Time: 5:30 PM
Number: PSY026
Abstract ID:900


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