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Issue: Vol. 632 No. 1: 27 Dec. 2023
Type: Article
Published: 2023-12-27
DOI: 10.11646/phytotaxa.632.1.5
Page range: 60-68
Abstract views: 390
PDF downloaded: 9

A new species, Hoya honglenae and the first report of H. acuminata and H. phuwuaensis (Apocynaceae, Asclepiadoideae) in the flora of Vietnam

Institute of Applied Technology; Thu Dau Mot University; No. 6 Tran Van On Street; Phu Hoa Ward; Thu Dau Mot City; Binh Duong Province; Vietnam
Komarov Botanical Institute of the Russian Academy of Sciences; Prof. Popov Street 2; 197376; St. Petersburg; Russia
Institute of Tropical Biology Vietnam Academy of Science and Technology; 85 Tran Quoc Toan; District 3; Ho Chi Minh City; Vietnam
Institute of Tropical Biology Vietnam Academy of Science and Technology; 85 Tran Quoc Toan; District 3; Ho Chi Minh City; Vietnam
Institute of Applied Technology; Thu Dau Mot University; No. 6 Tran Van On Street; Phu Hoa Ward; Thu Dau Mot City; Binh Duong Province; Vietnam
Komarov Botanical Institute of the Russian Academy of Sciences; Prof. Popov Street 2; 197376; St. Petersburg; Russia
Institute of Tropical Biology Vietnam Academy of Science and Technology; 85 Tran Quoc Toan; District 3; Ho Chi Minh City; Vietnam
Eudicots endemism Hoya sect. Peltostemma Hoya sect. Pterostelma Hoya caudata Hoya soidaoensis Kien Giang Province Phu Quoc Island plant conservation plant diversity plant taxonomy

Abstract

Three species of the genus Hoya (Apocynaceae, Asclepiadoideae) are newly reported for the flora of Vietnam. One species, Hoya honglenae, is described and illustrated as new to science, and two species, H. acuminata and H. phuwuaensis, are reported as new national records known earlier, respectively, in Bhutan, Bangladesh, NE India, W China, Myanmar; and NE Thailand. The new species discovered in Phu Quoc Island (Kien Giang Province) morphologically is most close to H. phuwuaensis, but differs in the entire, straight leaf margin, leaves sparsely white speckled adaxially and dirty purple speckled abaxially, smaller yellow flowers, conoid, obtuse, distally up-cured outer angle of corona lobes, and much longer anther appendages. The paper provides morphological descriptions, data on habitat, phenology, distribution, estimated conservation status, taxonomic notes, a list of studied specimens, and color illustrations for all studied species. Taking into consideration our new data, the genus in Vietnam currently includes 44 species.

 

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