Overview
Leafless epiphytes or rarely lithophytes. Stems short, successively dying from the base. Scale leaves acute to rostrate, sheathing the apical meristem. Roots firmly or loosely attached tothe substrate, terete or slightly flattened. Inflorescences axillary racemes, few to many, short to long, laxly or densely flowered. Flowers small to minute. Sepals and petals free, rarely fused. Lip unlobed or three-lobed, with a subglobose to cylindric spur. Column fleshy, very short to elongate; pollinia 2, subglobose to pyriform, attached to a common stipe with a viscidium.