Epiphytic or lithophytic, usually stemless and commonly leafless herbs (C. godefroyana (Rchb.f.) Schltr. may have persistent leaves clustered at stem apex at anthesis). Roots flattened, ribbon-like or subcylindric, scabrid, green, photosynthetic. Leaves (when present) oblong-elliptic to ligulate, obliquely subacute or unequally bilobed, sometimes slightly falcate, articulate. Inflorescence lateral, racemose, rarely paniculate (C. ramifera Seidenf. and C. trudelii Seidenf.), erect or pendent, many-flowered, pilose or glabrous; floral bracts ovate-lanceolate. Flowers resupinate, ephemeral, fragrant, white to yellow, with or without reddish or purple spots. Sepals and petals free, subequal, oblong-ovate or oblong-elliptic, lateral sepals and petals usually laterally adnate to column foot by a broad base. Labellum clawed, articulate to apex of column foot, motile, trilobed, basal portion concave or saccate, with an erect or ascending, entire or weakly bilobed, pilose callus on inner surface of posterior wall, side lobes erect, midlobe commonly abbreviated, transverse, entire or rarely bilobed, disc often pilose. Column semi-terete, foot perpendicular to column, broad, at least twice as long as column; clinandrium shallowly excavate, with a membranous posterior margin; anther cap provided on either side with a long-filiform, glandular-tipped appendage, or appendages reduced to a small tooth; pollinia four, waxy, stipe sublinear, viscidium small; stigma transverse, deeply set; rostellum deflexed, shortly bifid after removal of pollinarium.