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Genus :

HOYA

Family :

ASCLEPIADACEAE

Description


Twining pendulous or epiphytic shrubs, rarely erect, with rooting stems. Leaves thick, fleshy or coriaceous. Cymes umbel-like, solitary at the nodes. Flowers light scented. Calyx small, 5-lobed, glandular within. Corolla rotate, fleshy or waxy, lobes spreading, reflexed, valvate in bud. Corona single, scales 5, large, fleshy, horizontally spreading segments attached to the staminal column, produced at the inner angle into a tooth or spur projecting inward or erect. Anthers connivent over the stigma, with inflexed membranous tip. Pollinia caudicular, erect, solitary in each anther sac. Staminal column very short. Stigma 5-angled, tip flattened or slightly apiculate. Follicles 2. Seeds small, ovate or oblong, coma long.

Key to the species

Serial Key Reference
1a. Leaves glabrous; petiole up to 1.5 cm long; peduncles up to 6 cm 2
1b. Leaves thinly covered with long, erect hairs on both surfaces; petiole 2.0-2.5 cm long; peduncles 7-9 cm long H. globulosa
2a. Corona lobes stellate spreading; margin strongly reflexed and enclosing a hollow space at base H. carnosa
2b. Corona lobes not stellate spreading, boat-shaped; margin not reflexed and notenclosing a hollow space at base H. parasitica