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!Uncaria Schreb. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Published In: Genera Plantarum 1: 125. 1789. (Gen. Pl.) Name publication detail

Project Name Data (Last Modified On 6/10/2009)
Acceptance : Accepted
Taxon Profile     (Last Modified On 4/9/2014)
Generic Distribution: not endemic to the Malagasy Region
Generic Species Diversity and Endemism Status: based on existing literature
No. of species in Fl. Madagasc.: not published
Accepted Published Species: 1 indigenous non-endemic
Estimated Unpublished Species: none
Estimated Total Species: 1 indigenous non-endemic
Species Level Data Entry: complete

Uncaria includes about 30 species of woody lianas that climb by means of unusual hooked spines (or thorns), which are produced in the axils of the leaves. These are considered to be modified peduncles, and occasional plants have partially curved, unusually long spines that bear a few flowers at their ends. Uncaria is also distinctive in its capitate, globose inflorescences with the sessile flowers closely packed together though not fused to each other. The fruits are rather small ellipsoid to fusiform capsules, which become separated as they mature on expanding basal stipes or pedicels -- thus at first glance the inflorescences appear very different in arrangement from the infructescences. Uncaria is found in both the Old and New World tropics, with two species in the Neotropics, one in Africa and Madagascar, and the rest in Asia (Ridsdale 1978). This genus was transferred to the Cinchoneae by Ridsdale (1978), but Razafimandimbison & Bremer (2001) found both morphological and molecular sequence data supported its previous classification in the Naucleeae. This genus was often treated under the name Ourouparia in older floras but that name is now rejected in favor of Uncaria.

Uncaria plants from Madagascar have been included in the circumscription of U. africana by recent authors (Ridsdale 1978: p. 96; Bridson & Verdcourt 1988: pp. 450-452). Ridsdale recognized three subspecies of U. africana, with two of them confined to continental Africa and the Madagascar plants included in the typical subspecies. Haviland cited the name "Uncaria madagascariensis Baill.", but this is an error: Baillon's name was published as Ourouparia madagascariensis. Haviland also gave an incorrect page number for the publication of Baillon's name. Many subsequent authors (e.g., Ridsdale 1978) have simply copied Haviland's errors, which has led to some confusion.

Compiled or updated by: C.M. Taylor VIII 2011



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