Main features of the subgenus :
Deciduous shrubs ; scales lacking ; indumentum of simple hairs. Inflorescence lateral, below vegetative buds, 1-flowered. Calyx with gland-fringed lobes. Corolla rotate. Stamens 5, strongly dimorphic, the three lower long, divergent, slightly pubescent below, and with large anthers, the upper two shorter, erect, densely pilose, and with small anthers. Ovary subglobose, impressed below the style. Capsule subglobose. Seeds without appendages.
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