Hoya lacunosa Bl.

Decoctions of all parts are used to detoxify insect bites, draw out pus, and reduce swellings.

Subshrubs epiphytic. Stems climbing to 1.5 m by adventitious roots, glabrous or sparsely pubescent. Petiole 3-12 mm, subglabrous; leaf blade ovate or ovate-lanceolate, 2-5 × 1.2-3 cm, glabrous or subglabrous, base cuneate or rounded, apex acute; lateral veins 2-4 pairs, obscure. Peduncle 2.5-7 cm, robust. Pedicel 5-13 mm. Sepals obtuse. Corolla white with violet dots, 6-7 mm in diam., tube conspicuously white villous inside; lobes suborbicular, much longer than tube. Corona lobes ovate, constricted at middle, outer angle rounded, inner angle acute, surface with a thin keel. Apical anther membranes triangular, exceeding stigma head; pollinia subobovate. Follicles lanceolate, 5-7 cm.

Cultivated in S Guangdong [introduced from Indonesia]

Otostemma lacunosum (Blume) Blume.

Hoya lacunosa is a species of plant in the genus Hoya native to Southeast Asia. Its native range is Thailand through Borneo, Java, Sumatra, and the Philippines, and it is introduced in other countries as well. Like most Hoya, it is an epiphytic vining climber. It has smooth ovate to lanceolate leaves, and flowers that are scented like cinnamon.