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Abstract Detail

Systematics Section

Schori, Melanie [1], Utteridge, Timothy [2], Stuppy, Wolfgang [3].

Possibly unique: the fruit morphology of Stemonuraceae.

The twelve genera of Stemonuraceae, which were segregated from Icacinaceae in 2001, exhibit several distinctive fruit morphologies. The Stemonurus-type fruit (2 genera) is a relatively large, bicolored drupe with a thick epicarp. The fruits of Cantleya are superficially similar but are not bicolored, and they have an internal cavity that has been referred to as a pseudolocule. Gomphandra, the largest genus, has a thin fleshy mesocarp and a prominent longitudinal sulcus. Medusanthera-type fruits (7 genera) are laterally compressed relative to the sulcus and bear a fleshy appendage over the sulcus. Grisollea has a laterally compressed drupe but lacks a fleshy appendage. Although these fruit have been described in the course of species accounts, no family-wide comparison of fruit morphologies has been done. Fruit morphology and anatomy are compared for the genera, with assessments of homologies, relationships to floral syndromes, and adaptations for animal dispersal. The Medusanthera-type fruit, with a fleshy appendage evidently produced by the ovary wall, is apparently found in only one genus outside of Stemonuraceae. Apodytes, which was retained in Icacinaceae, also has a fleshy appendage, but it is probably independently derived.

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1 - Ohio University, Department of Environmental & Plant Biology, 315 Porter Hall, Athens, OH, 45701, USA
2 - Royal Botanic Gardens, Kew, Herbarium, Richmond, Surrey, TW9 3AE, United Kingdom
3 - Royal Botanic Gardens, Kew - Wakehurst Place, Millenium Seed Bank, Ardingly, West Sussex, RH17 6TN, United Kingdom

fruit anatomy
fleshy appendage

Presentation Type: Oral Paper:Papers for BSA Sections
Session: 4
Location: Cottonwood D/Snowbird Center
Date: Monday, July 27th, 2009
Time: 9:00 AM
Number: 4005
Abstract ID:274