Tufted epiphytic herbs without pseudobulbs. Leaves erect or arching, plicate, subcoriaceous, linear-lanceolate to elliptic-lanceolate, acute or acuminate, 15-60 cm. long and 3-5 cm. wide. Inflorescences of short, 1-flowered, erect or arching scapes 3.5-10 cm. long, from the axils of the basal non-foliaceous bracts. Flowers large and conspicuous. Sepals subequal, rather fleshy, concave, spreading, the dorsal sepal free, white, linear-elliptic to obovate, obtuse, 2.5-3.2 cm. long and 1.6-1.8 cm. wide, laterals somewhat connate at the base, obliquely inserted on the column foot, white with a long greenish-yellow blotch near the base, elliptic-lanceolate to oblanceolate, obtuse, 2.5-3.5 cm. long and 1.8-2 cm. wide. Petals spreading, subequal to the dorsal sepal, white, inserted on the base of the column, spatulate to oblanceolate, obtuse, 2.5-3 cm. long and 1.5-1.8 cm. wide. Lip rather fleshy, 3-lobed, 2-3 cm. long and about 2.5 cm. wide, rich yellow, the basal callus marked reddish brown, abruptly contracted at the base into a conspicuous ligular claw which is continuous with the column foot, the limb forming an obtuse geniculate angle with the claw, the subfalcate lateral lobes resting against the ba!se of the column, forming a deep concavity which is surrounded by a conspicuous erect, semicircular, plurisulcate callus, the frontal lobe convex to slightly ventricose, the apical margins often reflexed. Column short, stout, white, semi-terete, 1.3-1.5 cm. long, produced at the base into a short foot. Anther terminal, lavender.
Home