Notes on the Asclepiadaceae of China

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Abstract
This paper is a precursor to the account of the Asclepiadaceae in the Flora of China. A new genus and species, Sichuania alterniloba, is described. Twenty-four new species are described in Biondia (B. crassipes, B. laxa, B. parviurnula, B. revoluta, and B. tsiukowensis), Ceropegia (C. sinoerecta), Cynanchum (C. bicampanulatum, C. brevicoronatum, C. duclouxii, C. kingdonwardii, C. longipedunculatum, C. megalanthum, C. pingshanicum, C. rockii, and C. sinoracemosum), Hoya (H. commutata and H. mekongensis), Marsdenia (M. brachyloba, M. tenii, and M. yuei), and Tylophora (T. forrestii, T. rockii, T. tuberculata, and T. uncinata). Jasminanthes is resurrected. Eleven new combinations are proposed in Ceropegia (C. exigua), Cynanchum (C. boudieri subsp. caudatum), Heterostemma (H. menghaiense), Hoya (H. chinghungensis), Jasminanthes (J. chunii, J. mucronata, J. pilosa, and J. saxatilis), and Tylophora (T. costantiniana, T. oligophylla, and T. tsiangii). The new name Cynanchum triangulare is proposed to replace C. deltoideum Hooker, not Hance. New synonymy is proposed in Cynanchum, Lygisma, Marsdenia, and Tylophora. The status of Merrillanthus is discussed.

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