90 ORCHIDACEJE 



This very distinct species is distinguished from its near allies, 

 D. tenue and D. parvulum, by the very narrow 1-nerved petals, 

 by its strict, almost rigid habit, and by its acute leaves. 



Between Suyoc and Pauai, Prov. Benguet, Luzon, October- 

 November, 1905, E. D. Merrill (no. 4854). 



Endemic. 



12. D. RECURVUM Ames supra, p. 12, t. 22. — Acori- 

 dium recurvum Ames Proc. Biol. Soc. Wash. 19: 148 (1906). 



An apparently pendulous epiphyte, with elongated fusiform re- 

 curved pseudobulbs. Pseudobulbs 3-4 cm. long, about 3 mm. in 

 diameter, clothed by loose nigropunctate sheaths. Leaves linear- 

 oblong, acuminate, apiculate, many-nerved, 10-12 cm. long, 10-14 

 mm. wide. Petioles slender, 18 mm. long. Peduncles below in- 

 florescence shorter than the leaves. Racemes 2.5-4 cm. long, 

 rather loosely flowered. Bracts 3 mm. long, longer than the ovary. 

 Flowers 10-13 or more, 3 mm. apart, rather fleshy, 6 mm. across 

 when spread out. Lateral sepals ovate, obtuse, 3-nerved, 4.5 mm. 

 long. Upper sepal elliptic-oblong, 4 mm. long. Petals 4 mm. 

 long, 2.5 mm. wide, obovate, suborbicular, 3-nerved. Labellum 

 3-lobed, from base to tip of mid-lobe 1-1.5 mm. long; lateral 

 lobes falcate, obtuse ; middle lobe quadrate, rounded at the angles, 

 with a tooth or mucro at the apex. At the base of each lateral 

 lobe is a thickened callus-like plate, and near the middle of the 

 lip a small tubercle. 



I). recurvum is most nearly allied to D. pumilum Reichb. f ., 

 although much larger in foliage, and quite different from it in habit. 

 The flowers are fleshy, nearly opaque, and red-brown when dry. 

 The recurved pseudobulbs, which arise from a creeping branched 

 rhizome, and the densely spotted sheaths, which clothe the imma- 

 ture pseudobulb and conceal the petiole and leaf-base, are char- 

 acters which distinguish this species clearly from all other species 

 of Dendrochilum thus far discovered in the Philippine Islands. 



Mt. Data, Distr. Lepanto, Luzon, November, 1905, E. D. Mer- 



