Gymnema wiyadae (Apocynaceae: Asclepiadoideae), a new species from eastern Thailand

Summary Gymnema wiyadae A.Kidyoo, recently discovered in eastern Thailand, is here described and compared with the morphologically similar species, G. inodorum (Lour.) Decne. and G. foetidum Tsiang. These three species are characterised by umbelliform cymes with subhypocrateriform, yellow flowers an...

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Bibliographic Details
Published in:Kew bulletin 2021-12, Vol.76 (4), p.819-825
Main Author: Kidyoo, Aroonrat
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Life Sciences
Original Article
Plant Ecology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
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Description
Summary:Summary Gymnema wiyadae A.Kidyoo, recently discovered in eastern Thailand, is here described and compared with the morphologically similar species, G. inodorum (Lour.) Decne. and G. foetidum Tsiang. These three species are characterised by umbelliform cymes with subhypocrateriform, yellow flowers and corolline corona of five longitudinal ridges with lines of stiff golden-brown trichomes running along two sides. Gymnema wiyadae is, however, clearly distinguished from the other two species by its pubescent stem and branches with trichomes arranged in two rows, stout peduncles and pedicels, and style-head with obtuse apex. Illustrations and photographs of the new species as well as an updated identification key for all known species of Gymnema R.Br. occurring in Thailand are provided.
ISSN:0075-5974
1874-933X
DOI:10.1007/s12225-021-09980-1