Main features of the subsection :
Shrubs, often epiphytic. Leaves evergreen, scales on lower surface broad-rimmed, touching. Inflorescence terminal, 1-2-flowered. Calyx conspicuous. Corolla open-campanulate ; stamens 11-16 ; regularly arranged ; ovary tapering into the sharply deflexed style. Seeds conspicuously winged and finned.
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