Hoya lacunosa Blume

Wiry twiner to several metres long, latex white. Leaf blade lanceolate-ovate, succulent, flat, up to 2.7 cm long and 1.5 cm wide, green, silver flecking absent, hairless; margins entire, not recurved, same colour as rest of blade; venation penninerved, with 5 or 6 lateral veins, rather obscure; base cordate to rounded; tip acute to acuminate. Umbel positively geotropic, concave, of 10-30 flowers in tight ball. Corolla 5-5.5 mm wide, cream; lobes ovate, 3-3.5 mm long, 2.8-3 mm wide, strongly reflexed, shaggily papillose. Corona cream.

Malesia

Corolla 5-5.5 mm wide, cream; corona cream.

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.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Gentianales
family       Apocynaceae
genus        Hoya R.Br.