ORCHIDACE^ 



bricated so that each blade appears triangular, about 2.2 em. 

 long on the lower margin, about 1.7 cm. long on the upper mar- 

 gin, and about 7 mm. across the widest part of the blade; the 

 upper margin narrowly scarious, extending about 5 mm. beyond 

 the leaf above and more or less narrowed to an obtuse tip. Pe- 

 duncle below the raceme 7 mm. long, striate, thickly covered with 

 whorls of lanceolate, fimbriate bracts. Raceme about 8 cm. long, 

 4 mm. wide, arcuate-flexuous. Rachis striate, closely pubescent. 

 Bracts of the raceme lanceolate, concave, deeply fimbriate. 

 Flowers subverticillate, very dense in the middle of the raceme, 

 looser below and above, near the apex the rachis provided only 

 with whorls of appressed bracts. Lateral sepals about 1.1 mm. long, 

 ovate, acute. Dorsal sepal about 1.1 mm. long, round-ovate, more 

 or less obtuse. Petals about 1 mm. long, narrowly ovate. Lip much 

 larger than the sepals, about 1.5 mm. long and equally broad at 

 the base, in outline triangularly subquadrate or subquadrate, the 

 base broadly truncate and extended into short rounded auricles, 

 above the auricles the hmb gradually contracting to a deeply 

 bilobed apex, the lobules broadly rounded, the sinus narrow, the 

 apices slightly converging; disc slightly concave and thickened 

 in the middle near the base. Another form of lip is definitely sub- 

 quadrate in outline and about equally wide near the base and 

 apex. Ovary densely tomentose. 



This species closely resembles Oberonia aporophylla Reichb. f. 

 vegetatively, but differs markedly in the flower. O. spathulata 

 Lindl. also suggests O. triangularis superficially. The deeply im- 

 bricating leaves with short free apices give this species a distinc- 

 tive appearance, but the single specimen that constitutes the type 

 fails to show the variation that is highly probable. Another col- 

 lection, Clemens 275 A, represents a form with somewhat shorter 

 clustered stems, more spreading sub-fleshy leaves and deflexed 



[ 86 ] 



