Gymnema phuquocense (Apocynaceae, Asclepiadoideae), a new species from Vietnam

Authors: Ha, Bui Thu DOI: 10.3897/phytokeys.251.136457 Published: Jan. 1, 2025 Source: PhytoKeys OpenAlex: View in OpenAlex

Collection: Pensoft Publishers

Keywords: Asclepiadoideae · Topics: Plant Diversity and Evolution, Plant and Fungal Species Descriptions, Plant and animal studies

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A new species of Gymnema from Vietnam – G. phuquocense – is described, illustrated, and compared with the similar G. yunnanense. Gymnema phuquocense differs from G. yunnanense by the length of peduncle (3–4 mm vs. 10–13 mm), hairs on corolla lobe margin (absent vs. present), shape of seed (broadly ovate vs. ovate-oblong), shape of scale with 2 prominent longitudinal ridges on corolla tube (lanceolate vs. linear), and length of seeds (9–10 mm vs. 13–15 mm). A diagnostic key of the Gymnema species in Vietnam is also provided.

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