monopodial herbs. Stems short. Leaves few, oblong-lanceolate, obtusely bilobed.
Inflorescence lateral, slender, laxly many flowered raceme, rarely
subpaniculate, producing flowers at intervals; peduncle slender, sometimes
thickened and angled near apex; floral
bracts minute. Flowers minute, thinly textured. Sepals and petals, subequal,
oblong, ringent. Lip trilobed, firmly adnate to base of column, saccate or spurred,
with a wide, broad opening, lacking interior ornamentation. Column small,
cylindric, foot absent; stigma large; anther cap cucullate. Pollinia 4,
spathulate, each completely divided into very unequal halves on a long,
stipitate; anthers cullate, triangular.