Plants herbaceous, with flat, palmately divided tuberoids. Stem solid or ± hollow, leafy. Leaves usually crowded near base, with or without purplish spots. Inflorescence cylindric, few to many-flowered. Bracts herbaceous, the lower exceeding the purplish, yellowish or rarely white flowers. Flowers resupinate. Dorsal sepal ± erect, connivent with slightly shorter petals, forming a loose hood; lateral sepals ± spreading. Labellum with basal spur, entire or 3-lobed, with darker colored pattern of lines and dots. Column short; anther erect, bilocular, basally firmly united with the column; pollinia clavate, with caudicles, each with a separate viscid gland, both enclosed in a single pouch (bursicula); stigma entire, slightly concave. Ovary sessile, ± twisted, glabrous.