102 



ORCHIDACEM 



25. D. MERRILLII Ames supra, p. 12, t. 23. — Acoridium 

 Merrillii Ames Proc. Biol. Soc. Wash. 19: 151 (1906). 



Near DendrochUum exalatum J. J. Smith. Pseudobulbs clus- 

 tered, monophyllous, 2-2.5 cm. long, fusiform, grooved and fur- 

 rowed when dry, sheaths 2.5-7 cm. long, maculate, acute. Leaf 

 oblong-lanceolate, acuminate, acute, 11-14 cm. long, about 2 cm. 

 wide. Petiole 2.5-3.5 cm. long. The prominently nerved lamina 

 of the leaf, which becomes very dark in color when dried, passes 



Dendeochilum Mebbillii 



abruptly into the petiole. Peduncle below raceme very slender, 

 0.5 mm. in diameter, naked, without imbricating bracts at the 

 summit below the inflorescence, equalling the leaf or slightly 

 shorter. Inflorescence a loose, graceful, comparatively large- 

 flowered raceme, 1 dm. long, 1.5-2 cm. through. Floral bracts 

 linear-lanceolate, acute, about 3 times longer than the ovary and 

 pedicel, 4-7 mm. long, the slender awn-like apical portion up- 

 curved. Flowers 4 mm. apart. Lateral sepals linear-lanceolate, 

 acuminate, acute, carinate, 3-nerved, 9 mm. long, 2 mm. wide, 

 spreading. Upper sepal similar to the lateral ones, of equal 

 length with them. Petals oblong-lanceolate, microscopically and 

 irregularly toothed along the margin, acute, 3-nerved, 6 mm. long. 



