ORCHIDACE.E 



visu subtrilobato, plicatissimo ; calcar perbreve, arcuatum. Gyno- 

 stemium crassum. 



Plant stout, apparently erect, the peduncle and leaf shoot sub- 

 approximate and invested below by a long lanceolate sheath. 

 Leaves three or four on each shoot, about 35-50 cm. long, 7-15 

 cm. wide, much surpassing the peduncle, broadly to narrowly 

 elliptic, more or less abruptly long and narrowly acuminate, pro- 

 vided with a long winged sulcate petiole, membranaceous in the 

 dried specimen, with three to five nerves very prominent be- 

 neath. Peduncle 30-50 cm. long, stout, suberect from a decum- 

 bent base, clothed "vvith several deltoid to narrowly lanceolate, 

 tubular, appressed sheaths. Rachis very remotely four- to ten- 

 flowered, somewhat zigzag, notably narrowed toward the sum- 

 mit. Bracts deciduous, about 3.6 cm. long, 2 cm. wide, elliptic- 

 ovate, acuminate to a cucuUate apex, concave. Flower large and 

 spreading, ±7.5 cm. across, variable in size. Lateral sepals about 

 4.15 cm. long, 1.4 cm. broad, oblanceolate, oblique, acute, mucro- 

 nate, carinate, about seven-nerved. Dorsal sepal about 4.3 cm. 

 long, 1.35 cm. broad, similar to the lateral sepals, oblanceolate, 

 carinate, obtuse but somewhat mucronate from the dorsal keel, 

 about seven-nerved. Petals about 4.1 cm. long, 1.25 cm. broad, 

 spatulate-oblanceolate, very sUghtly falcate, apex rounded very 

 obhque and apiculate, about seven-nerved. Lip adnate to the 

 base of the column for a distance of ±1 cm.; lamina in outUne 

 transversely suborbicular-oval, about 2.5 cm. long, 3 cm. wide, 

 subtrilobed, center of the disc longitudinally thickened and pro- 

 vided in the middle with a pair of approximate, semi-elhptic 

 fleshy keels that converge near the apex into a narrowly lance- 

 olate papillose callus; the margins strongly plicate, but when ex- 

 panded no demarcation of lobes apparent ; lateral lobes appear- 

 ing semi-obcordate, middle lobe broadly reniform, shallowly re- 



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