Perennial herbs, up to 3 m high. Inflorescence terminal, erect. Flowers bisexual, 1-6 per bract, each subtended by a tubular bracteole. Corolla tube long, slender, usually exceeding calyx; petals strap-shaped; labellum narrowed at base with conspicuous, usually bilobed limb. Stamen with long, slender filaments; lateral staminodes petaloid. Ovary 3-locular; placentation axile. Fruit globose or oblong. x= 17 (aneuploids).
Species +/- 45, Asian; 3 naturalised in sthn Afr., near coast in KwaZulu-Natal.