ORCHlDACEiE 



pressed than the stem. Bracts of the inflorescence mostly decidu- 

 ous, but several at the tip of the rachis persistent, erect, about 

 1.7 cm. long, lanceolate, apparently conduplicate, dull, thinnish. 

 Flower membranaceous in the dried plant. Lateral sepals nearly 

 2 cm. long, 5.5 mm. wide near the base, narrowly lanceolate, acu- 

 minate, mucronate, cymbiform, gibbous-saccate at the base, five- 

 nerved, dorsally strongly keeled especially at the apex. Dorsal 

 sepal similar, 1.85 cm. long, 6.5 mm. wide near the base, dorsal 

 keel evanescent, but at the apex formed into a backward pointing 

 mucro. Petals about 1.6 cm. long, 1.5 mm. wide at the base, nar- 

 rowly linear, very unequally and sharply bidentate at the apex, 

 one-nerved. Lip about 1.5 cm. long, in outline ovate-oblong, 

 three-lobed; hypochil about 1.1 cm. long, 1 cm. broad when ex- 

 panded ; lateral lobes erect, oblong semi-orbicular, with the free 

 portion about 1.5 mm. long, 3.5 mm. broad; middle lobe about 

 9 mm. long, 8.5 mm. broad, from a short broad claw abruptly 

 dilated into the nearly orbicular epichil, slightly retuse and 

 broadly obtuse apiculate, undulate on the margins, somewhat 

 thickened on the lateral nerves ; three low, fleshy, simple keels run 

 from the base of the lip, the lateral keels about to the center of 

 the middle lobe, the lower central keel only through the hypochil 

 but continued as a thickened ridge through the middle lobe or 

 epichil where it meets the converging continuations of the lat- 

 eral keels. Column about 11.5 mm. long, arcuate, subequal to the 

 hypochil, prominently winged especially above ; apex truncate, 

 shallowly toothed. Clinandrium prominent, ovate-triangular. 

 Rostellum thick, very shallowly indented. 



In addition to the type material there are other collections 

 of this species made by Clemens that show striking variability 

 in habit, some of them having clusters of imbricating bracts 

 on the rachis. The large collection by Haslam closely simulates 



[ 27 ] 



