ORCHIDACEtE 



concava, late rotundata, leviter trinervia. Sepala lateralia rotun- 

 dato-ovata. Sepalum dorsale oblongo-ovatum. Petala breviora, 

 lineari-oblanceolata, apice late rotundata, uninervia. Labellum in 

 circuitu suborbiculare, trilobatum, in auriculas binas dorsales 

 extensum ; lamina infra medium lata, basi in medio sulcata ; lobi 

 laterales bidentati; lobus medius semiorbicularis, bilobatus; au- 

 riculae deltoideae, obtusae. Gynostemium breve, bialatum. 



Roots numerous, fibrous, flexuous. Rhizome creeping. Stem 

 up to 7 cm. long, often once branched at the base, stout, slightly 

 flexuous, entirely concealed by the swollen, tubular, membra- 

 naceous leaf sheaths. Petioles short, broadly winged, merged with 

 the leaf sheaths. Leaves three to nine, more or less approximate, 

 up to 10.7 cm. long, 3.2 cm. wide near the base, lanceolate or lance- 

 oblong, very broadly rounded and oblique at the base, broadly 

 dilated just above the base, then gradually long acuminate to 

 the apex, membranaceous in the dried plant, undulate on the 

 margins, with three or five prominent nerves. Peduncle includ- 

 ing the raceme about 31 cm. in height, single or rarely two, erect 

 or nearly so, glabrous, provided with one or several linear bracts. 

 Rachis ±20 cm. long, generally slightly nodding at the sum- 

 mit. Bracts up to 7 mm. long, narrowed from a broad base to 

 an obtuse apex. Flowers appearing crowded when immature, but 

 the fruiting pedicels scattered. Sepals strongly concave, broadly 

 rounded above, indistinctly three-nerved. Lateral sepals about 



2.5 mm. long, 1.9 mm. wide, round-ovate. Dorsal sepal about 



2.6 mm. long, 1.6 mm. broad, oblong-ovate. Petals about 2.2 mm. 

 long, .8 mm. wide near the apex, linear-oblanceolate, broadly 

 rounded above, one-nerved. Lip suborbicular in outline, three- 

 lobed, auriculate; limb ±2.3 mm. long, 3.15 mm. wide below the 

 middle, sulcate at the base in the middle; lateral lobes extended 

 on each side into two or three linear triangular teeth, the outer 



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