Wiry twiner to several metres long, latex white. Leaf blade elliptic to orbicular, succulent, flat, 1-1.5 cm long, 0.8-1 cm wide, green, silver flecking absent, velutinous-hairy; margins entire, not recurved, dark purple; venation penninerved, obscure; base rounded; tip acute. Umbel negatively geotropic, concave, of 5-15 flowers in loose ball. Corolla 5-7 mm wide, yellow-apricot; lobes lanceolate-ovate, 4.5-5 mm long, about 4 mm wide, strongly reflexed, shortly papillose. Corona yellow-apricot. [H. sp. Sarawak]

Sarawak

Corolla 5-7 mm wide; corolla and corona yellow-apricot.

Source: Forster, P.; Liddle, D.; Liddle, I. (2002). Hoya. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.