Hoya bella Hook.

Pendent, non-twining herb to 1 m long, latex white. Leaf blade oblanceolate, succulent, flat, 1.5-6 cm long, 1-1.5 cm wide, green, silver flecking absent, hairless; margins entire, not recurved, same colour as rest of blade; venation penninerved, obscure; base cuneate or rounded; tip acute or acuminate. Umbel positively geotropic, concave, of 5-10 flowers in tight ball. Corolla 12-13 mm wide, white; lobes triangular-ovate, 5-6 mm long, 4-5 mm wide, slightly inflexed to flat, shortly papillose. Corona pink. [H. lanceolata subsp. bella (Hook.) D.H. Kent]

Burma

Subshrub with succulent leaves, white corolla and pink corona.

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.