Mystacidium Lindl.

Dwarf or small monopodial epiphytic herbs. Stems short, covered by imbricate sheathing leaf-bases. Leaves distichous, fleshy or coriaceous, articulated to sheathing leaf-bases. Inflorescences axillary, 2–several-flowered; peduncles slender, wiry. Flowers small to medium-sized, white, pale green or pale yellow. Sepals and petals free, subequal, spreading or subconnivent. Lip entire or 3-lobed, spurred at the base, usually ecallose; spur tapering from a broad mouth. Column short; rostellum pendent, 3-lobed, with outer lobes much longer than the mid-lobe and papillate; pollinia 2, globose, sulcate; stipites 2, linear, slender; viscidia 2, rarely adherent, oblong or squamiform.