84 ORCHIDACEJE 



mm. through, bracts glumaceous, clasping the flowers, about 2 mm. 

 long. Flowers about 2 mm. apart in rather dense, distichous 

 racemes. Lateral sepals lanceolate, acute, 3-nerved, slightly con- 

 duplicate at the apex, 4.5 mm. long, 2 mm. wide. Upper sepal 

 similar to the laterals, narrower, about 4 mm. long. Petals lanceo- 

 late, acute, 3-nerved, broadly clawed, 3 mm. long, about 1.5 mm. 

 wide. Labellum 3-lobed, E-shaped ; lateral lobes oblong, broad- 

 ened toward the end, with an auricular or rounded lobe at the 

 base on the outer margin ; middle lobe or division oblong, with a 

 sharp mucro at the tip, with a thickened, transverse ridge at the 

 base, which passes into two truncate calli, one at the base of each 

 lateral lobe. In the depression at the centre of the lip is a minute 

 callus on the median nerve. Column less than 1 mm. long, stout, 

 similar to the column of D. tenellum. 



In D. graminifolium we have an interesting and instructive 

 transition between the filamentous-leaved D. tenellum and the 

 broad-leaved D. venustulum and D. pumilum forms of the section 

 Acoridium. The fleshy flowers, which are nearly opaque, and the 

 very complex lip of D. graminifolium distinguish it very clearly 

 from its near allies. The character of the lip is worthy of special 

 attention, as the structure of the calli is more like that of the calli 

 of D. venustulum and its allied species than like the calli of D. tenel- 

 lum, thus forming a striking transition between the two groups. 



Between Suyoc and Pauai, Prov. Benguet, Luzon, alt. 6500 ft., 

 October-November, 1905, E. D.Merrill (no. 4764) ; additional ma- 

 terial from Mt. Data, Distr. Lepanto, Luzon, November, 1905, E. D. 

 Merrill (no. 4594). — Fls. white, alt. 1600 m., trail to Balbalassan, 

 Distr. Lepanto, Luzon, November 19,1906, W. Klemme (no. 5734). 



Endemic. 



6. D. EXILE sp. nov. Aff . D. graminifolio habitu, sed foliis 

 brevioribus et inflorescentia laxiore. Pseudobulbi graciles, teretes. 

 Folia linearia, graminea, 9-13 cm. longa, ± 3 mm. lata, acuta. 

 Peduneuli filiformes, ± 1 dm. longi. Pacemus 3.5 cm. longus. 

 Flores viridi-flavi, inodori, circa 6 mm. in diametro inter apices 



