Microcoelia Lindl.

Leafless epiphytic or rarely lithophytic herbs with short stems. Roots firmly or loosely attached to the substrate, often dense, terete or less commonly dorso-ventrally flattened, smooth or rarely verrucose, unbranched or with a few branches, usually elongate. Scales on stem protecting the stem apex, acute to rostrate. Inflorescences few–many, axillary, racemose, concentrated in the apical part of the stem, few–many-flowered; peduncle long or short; rhachis terete or angular, smooth or with processes; bracts sheathing or not. Flowers small to minute, ± sessile or pedicellate, usually white variously tinged with green, brown or pink on spur and other segments. Sepals and petals free, subsimilar. Lip entire or obscurely 3-lobed, free, usually with fleshy calli at the base either side of the mouth of the spur; spur globose, cylindrical or variously swollen. Column fleshy; androclinium short to long; anther-cap hemispherical, often elongated at the apex; pollinia 2, subglobose to pyriform; stipes linear to oblanceolate, entire or bifid at the apex; viscidium linear or oblong, short to long; rostellum bifid, short to as long as the column.