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25 February 2019 Argostemma vietnamicum (Rubiaceae), a New Species from Vietnam
Bui Hong Quang, Ritesh Kumar Choudhary, Tran The Bach, Do Van Hai, Nguyen The Cuong, Joongku Lee
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Abstract

Argostemma vietnamicum B.H. Quang, Joongku Lee & R.K. Choudhary, a new species of Rubiaceae from Thua-Thien Hue Province of central Vietnam is described and illustrated. It is morphologically similar to A. discolor and A. bariense, but differs from them by having considerably shorter petioles, round to obovate leaf laminae with a round base, obsolete secondary veins, 1–4-flowered inflorescences, much shorter peduncles and pedicels, different bracts, a glabrescent to glabrous calyx, and a shorter corolla tube. An identification key to the species of Argostemma known from Vietnam is provided.

© Finnish Zoological and Botanical Publishing Board 2019
Bui Hong Quang, Ritesh Kumar Choudhary, Tran The Bach, Do Van Hai, Nguyen The Cuong, and Joongku Lee "Argostemma vietnamicum (Rubiaceae), a New Species from Vietnam," Annales Botanici Fennici 56(1-3), 27-31, (25 February 2019). https://doi.org/10.5735/085.056.0105
Received: 4 June 2018; Accepted: 10 August 2018; Published: 25 February 2019
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