Overview
Terrestrials arising from tubers. Stems erect, leafy, unbranched, sometimes dimorphic with leafy sterile shoots separate from the flowering shoots. Leaves sessile, few and basal or many and cauline, graduated in size from the base. Inflorescences erect, scapose racemes, the floral bracts prominent. Flowers few to many, not resupinate. Sepals and petals fused at the base, with recurved apices. Lip unlobed, sessile, globose-saccate forming a hood, with a pair of retrorse, short or long spurs +/- parallel to the ovary. Column long, with a terminal, hooded stigma, with the anthers hanging from lower surface separated by a three-lobed rostellum; pollinia 2, granular, attached by caudicles to two distinct viscidia.