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| Ceropegia vietnamensis Nguyen-Phi & Luu, in Luu, Le et Nguyen, 2022. |
ABSTRACT
Ceropegia vietnamensis is described as a new species from Binh Chau - Phuoc Buu Nature Reserve in the Xuyen Moc district of Ba Ria- Vung Tau province. It is morphologically close to Ceropegia laotica in general appearance and coloration of flowers but differs in many vegetative and reproductive characteristics and grows in a different habitat. The new taxon is described, illustrated with field photographs of detailed botanical characteristics and compared to related species.
Keywords: Asclepiadoideae, Apocynaceae, Ceropegia vietnamensis, new species, Vietnam
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| Ceropegia vietnamensis Nguyen-Phi & Luu, sp. nov. A. Whole plant. B. Tuber yellowish inside and with fleshy roots. C. Leaf shapes. D. Inflorescence. E. Details of one inflorescence. F. Flowers and longitudinal section showing inside structure. G. Corona, side view and top view. H. Pollinarium. I. Ovary. J. Follicles. K. Seeds with coma |
Ceropegia vietnamensis Nguyen-Phi & Luu, sp. nov.
Ceropegia vietnamensis is morphologically close to Ceropegia laotica Rodda & Meve in general appearance and coloration of flowers but differs in having longer petioles (5–14 vs. 5–7 mm), lanceolate to linear-lanceolate (vs. linear-lanceolate) leaf lamina, longer bracts (3–3.5 vs. 1–2 mm), 3–30 (vs. 1–2)-flowered inflorescences, longer (45–57 vs. 35–45 mm) corolla with shorter (vs. longer) tube than lobes, narrowly triangular (vs. triangular) outer corona lobules, longer inner corona lobes(3–4 vs. 1–1.2 mm long) and ovate (vs. broadly ovoid) pollinaria.
Hong Truong Luu, Van Son Le and Phi Nga Nguyen. 2022. Ceropegia vietnamensis (Asclepiadoideae, Apocynaceae), A New Species from Vietnam. Academia Journal of Biology. 44(4); 19-26. DOI: 10.15625/2615-9023/17594 vjs.ac.vn/index.php/VJBio/article/view/17594
