Four new species, a new variety, and a status change in Argostemma (Rubiaceae) from Thailand

Kitichate Sridith, D. of Biology, F. of Sci., PSU.
E-mail : skiticha@ratree.psu.ac.th

Grant : stereichische Austauschdienst (AD), Austria
Published : Nord J Bot 1999a, 19(2) : 171-178
Key words : new species, Argostemma, Rubiaceae

Four new species of Argostemma, all endemic to Thailand are described: A. thaithongae, restricted to northern Thailand; A. monophyllum, rather widely distributed in the eastern half of Thailand; A. puffii and A. rotundicalyx, both endemic to peninsular Thailand. Var. variabile is a new variety of the peninsular Thailand species A. lobulatum. A. setosum, previously thought to be an endemic species of peninsular Thailand, is now considered to be a subspecies of A. laeve (Malay peninsula and Sumatra): A. laeve subsp. setosum, stat. nov.

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