Herbs, terrestrial, sympodial. Roots fleshy, villous. Stems succulent, glabrous. Leaves cauline, sessile [petiolate], not articulate; blade convolute, conduplicate, often membranous. Inflorescences terminal, dense spikes [racemes]; flowers spirally arranged; floral bracts mostly longer than flowers, membranaceous, scarious. Flowers few–many, resupinate, white with yellow lip, small, scarcely opening; sepals subequal; dorsal sepal erect, connivent with petals, forming hood over column; lateral sepals distinct and free, enclosing base of lip; lip pandurate, broadly rounded, margins entire, apex slightly broadened to winglike; column short; anther abaxial, 2-chambered, membranous; pollinia 2, sometimes 2-lobed, pyriform, sectile, caudicles present or absent; stigmas 2, on either side of column, convex; rostellum large, deeply divided. Fruits capsules, erect, ovoid [subglobose].
Terrestrial herbs, with long creeping rhizomes and erect leafy stems. Leaves sessile or petiolate, linear or ovate, with broad sheathing bases. Inflorescence terminal; scape with few sheaths; raceme long and slender with many small flowers, or short with fewer larger flowers. Flowers hardly opening. Petals connivent with dorsal sepal to form a hood; lateral sepals enclosing base of lip. Lip saccate at the base with 2 calli; mid-lobe shortly clawed or sessile, entire or bilobed. Column very short, with or without wings in front; 2 lateral stigmatic lobes; rostellum deeply divided; pollinia pyriform, with caudicle attached by an oblong viscidium to the rostellum.
Small, deciduous, shade-loving terrestrial orchids with creeping, above-ground stems. Leaves petiolate, relatively narrow, thin-textured, dark green, in loose basal rosette. Inflorescence terminal on stem, spicate, hairy, wiry or fleshy. Flowers resupinate, small, hairy or glabrous, dull-coloured, often short-lasting. Dorsal sepal concave, overlapping petals to form a hood. Lateral sepals free, flanking labellum base. Petals asymmetrical. Labellum with basal, pouch-like hypochil containing 1 to 3 stalkless glands, epichil bilobed, lobes spreading apart. Pollinia 2, attached to viscidium via short caudicles.
Rostellum deeply divided; pollinia pyriform, the caudicle attached to the rostellum by an oblong viscidium.
Petals adnate to the dorsal sepal and forming a hood with it; lateral sepals enclosing the base of the lip.
Inflorescence a terminal raceme; flowers small or very small, not opening widely.
Column very short, sometimes winged in front, with 2 lateral stigma lobes.
Terrestrial herb with creeping rhizomes and erect leafy stems.
Lip saccate at the base with 2 calli.