118 ORCHID ACEM 



crassa ; alae laterales terminales, 1 mm. longse, acutae; ala apicalis 

 quadrata, irregulariter dentata. 



B. bicallosum is closely allied to B. Meamsii Ames and B. 

 Copelandii Ames, but is larger in all its parts. In the labellum it is 

 quite unlike either of these species both in the calli and in outline. 



Epiphyte with brownish red flowers, alt. 2500 ft., Mt. Halcon, 

 November 28, 1906, E. B. Merrill (no. 5812). 



Var. MINOR var. nov. Speciei valde similis, sed distincta^on^ws 

 minoribus. Labellum spathulatum, apiculatum, non acuminatum. 



The variety is represented by a single specimen in the herbarium 

 of the Bureau of Science. While a more extended study based on 

 future collections may prove this to be a species nearly allied to 

 D. bicallosum, I have not deemed it wise to treat it more fully here. 

 The leaves appear to possess a somewhat different texture, and 

 the inflorescence is more slender and only about 7 mm. long. 



On ledge in forest, fl. pale salmon color, odorless, Mt. Halcon, 

 November 8, 1906, E. B. Merrill (no. 5663). 



40. D. G-RACILISCAPUM Ames supra, p. 12, t. 24. — Acori- 

 dium gradliscapum Ames Proc. Biol. Soc. Wash. 19: 152 (1906). 



Pseudobulbs fusiform, 1.5-2 cm. long, clothed by closely ap- 

 pressed, nigropunctate sheaths. Leaves linear, tapering at both 

 ends, obtuse, 10-15 cm. long, 5-6 mm. wide, petiolate. Peduncles 

 about 15 cm. long, filiform, below raceme shorter than the leaves. 

 Raceme densely flowered, 4.5 cm. long, about 5 mm. through. 

 Bracts broadly ovate, obtuse, about 1 mm. long. Flowers small. 

 Lateral sepals oblong-lanceolate, subacute, 2 mm. long, about 1 

 mm. wide. Petals slightly shorter than the sepals, linear-oblong, 

 obtuse, 1-nerved. Labellum oblong, entire, bicallose, 2 mm. long. 

 Column short, stout ; apex obscurely 4-lobed or crenulate; lateral 

 arms erect, arising from near the summit of the column, much 

 exceeding the terminal wing. 



