ORCniDACEM 183 



Stems slender, 2-3 mm. thick, swollen at base. Peduncle pen- 

 dulous, produced laterally from the upper nodes of the stems, 

 ± 12 cm. long, slender. Flowers about 1 cm. apart, about 2 

 cm. long. Bracts scarious, oblong, acute, 2 mm. long. Pedicels 

 1.5-2.5 cm. long, very slender. Lateral sepals forming an elon- 

 gated, genuflexed, slender tube 1.4 cm. long, open in front ; free 

 portion of the sepals semi-elliptic, obtuse, 1 cm. long, 5.5 mm. 

 wide. Upper sej)al narrower, 7.5 mm. long. Petals similar to the 

 upper sepal, elliptic, obtuse, 7.5 mm. long, 4 mm. wide. Labellum 

 ± 17 mm. long, claw narrow ; blade 9 mm. long, elliptic-oblong, 

 margin finely serrate ; disc papillose, thickened and obscurely ver- 

 rucose on the anterior part of the claw. Column small ; clinan- 

 drium microscopically toothed on the margin. 



In my herbarium is a specimen (no. 4813) of D. } Brienianum 

 sent to me by Mr. F. Sander of St. Albans, England, whose col- 

 lector discovered the species in Luzon. This specimen consists of 

 a single stem and two drooping racemes. The flowers are well 

 characterized by the sharp bend in the tube formed by the sepals. 

 The accompanying figure was prepared from my specimen. 



Endemic. 



D. (§Virgatae) POLYTRICHUM Ames Philipp. Journ. Sci. 

 (Bot.) 2: 328 (1907). Habitu simile D. setifolio Ridley atque 

 D. junceo Lind. Planta 3-4 dm. alta vel etiam altior. Caules in- 

 crassati per distantiam 6-8 cm., nodosi, supra gra,ci\es, foliis ali- 

 quot acutis semi-teretibusque, 7-10 cm. longis, ± 1 mm. in diame- 

 tro. Flores pauci, post diem unum duosve marcescentes et caduci, 

 comparate magni, 2-2.5 cm. longi, albi. Sepala lateralia 2-2.5 

 cm. longa, lanceolata, mentum 8 mm. longum formantia. Sepalxim 

 dorsale oblongi-lanceolatum, circa 1.3 cm. longum, acutum. Pe- 

 tala lineari-oblonga, acuta, circa 1.3 cm. longa, 2 mm. lata. Label- 

 lum 3-lobatum, ab apice usque ad basim 2.3 cm. longum ; lobus 

 terminalis oblongus, emarginatus, fimbriis ± 5 mm. longis copiose 

 fimbriatus ; lobi laterales rotundati, in margine anteriore pilis 

 brevibus sparsim ciliati ; discus intra lobos laterales pubescens. 



