Herbs, terrestrial or occasionally lithophytic. Rhizome elongate, creeping, several noded, fleshy; roots borne at rhizome nodes, stout. Stem erect, leafy. Leaves alternate, adaxially usually with silvery or pinkish veins and reticulation, oblong-lanceolate to elliptic; petiole-like base dilating into amplexicaul sheath. Inflorescence pubescent; peduncle with scattered sterile sheathing bracts; terminal raceme few to many flowered; floral bracts ca. as long as ovary, membranous. Flowers widely spreading, resupinate, relatively small; ovary twisted, terete, pubescent. Sepals free, ± similar; dorsal sepal concave, connivent with petals and forming a hood. Petals narrower than sepals; lip obliquely twisted, 3-partite, base connate with column margin; hypochile saccate, shallowly 2-lobed, containing 2 large fleshy calli; mesochile with erect margin, forming a subtubular passage; epichile enlarged into a transversely oblong limb. Column obliquely twisted in opposite direction to lip, apex dilated, abruptly contracted below anther; anther ovoid, large, 2-locular; pollinia 4, granular-farinaceous, sectile, narrowly obovoid, attenuating into slender caudicles that merge and terminate in a small, sticky, oblong viscidium; rostellum triangular, remnant bifid; stigma lobes confluent.