Terrestrial or epiphytic herbs with many-noded rhizomes. Roots basal. Pseudobulb fusiform, homoblastic, many-leaved. Leaves linear–lanceolate to lanceolate or elliptic–lanceolate, acute to acuminate, pleated, with a sheathing base. Inflorescences basal, racemose; bracts persistent. Flowers with cream, yellow–green or green sepals and petals and a white or pale green labellum spotted and veined with black or red. Dorsal sepal free, oblong– lanceolate to oblong–elliptic, spreading or incurved; lateral sepals oblique at base, falcate, otherwise similar to dorsal sepal. Petals free, porrect, similar to sepals but shorter and broader except in C. pardalina (Rchb.f.) Garay where heavily spotted with black. Labellum free to base of column, trilobed in basal part, callose, lateral lobes free to base of column, midlobe elliptic to flabellate, usually with undulate margins, strongly bilobed in C. pardalina; callus obscure or ridged. Column lacking a foot; anther cap conical, pollinarium with two, subglobose pollinia, stipe solitary, triangular to oblong, viscidium semi-lunate. Ovary cylindrical, grooved. (PC).