FLORA OF VIETNAM
Asclepiadaceae
Hoya vangviengiensis Rodda & Simonsson

Ha Giang prov., Quan Ba distr., Bat Dai Son commune, Bat Dai Son Nature Reserve, San Chu village, around point 23°08ʹ55.1ʺN 104°59ʹ45.7ʺE, 1000-1200 m a.s.l., karstic, highly eroded mountains composed of solid marble-like limestone, primary and partially degraded evergreen broad-leaved humid forest on rocky mountain slopes. Herbaceous vine 2-3 m long on exposed rocks. Flowers buds white with pink. Not rare. 13 April 2018, L. Averyanov, Nguyen Sinh Khang, Chuong Quang Ngan, T. Maisak, VR 058 (HN, L, LE01058091, E01067161). Det.: M. Rodda 11.10.2019.