82 ORCHIDACEM 



— Ceratostylis gracilis Naves Nov. App. 245 (1883) not Blume, 

 fide Rolfe Orch. Rev. I. c. 219, 220 (Ceratochilus, sjihalm.). 



Laruao River, Mt. Mariveles, Prov. Bataan, Luzon, December, 

 1904, R. Meyer (no. 2202). —On trees, alt. 2800-3000 ft., Mt. 

 Mariveles, September 21, 1905, H. JST. Whitford (no. 1357). — 

 On trees, fls. white, 3500 ft. alt., Mt. Mariveles, January 2, 1904, 

 R. S. Williams (no. 427) ; March 24, 1904, R. S. Williams 

 (no. 758). — Top of ridge, on trees, alt. 850 m., Mt. Mariveles, 

 October 17, 1906, F. W. Foxworthy (no. 1676). —Epiphyte, 

 fls. whitish, Mt. Halcon, Mindoro, alt. 4300 ft., November 13, 1906, 

 E. D. Merrill (no. 5839). —Mt. Halcon, Mindoro, alt. 4500 ft., 

 November, 1906, E. I). Merrill (no. 5720). — Vicinity of Baiios, 

 Luconia, Wilks Expedition (1838-42, specimen in hb. Gray). 



Endemic. 



3. D. SPHACELATUM comb. nov. — Acoridium sphacelation 

 Ames Orchidace^: fasc. 1, 3, 1. 1 (1905). — This species has been 

 collected but once, and is apparently much rarer than its near ally 

 D. tenellum, from which it is readily distinguishable by the very 

 different labellum. The brown bordered bracts appear not to 

 have been fortunately chosen for the designation of the species, 

 as in a plant of D. tenellum collected by Foxworthy (no. 1676) 

 the sphacelate character has also been detected. 



Endemic. 



4. D. WILLIAMSII Ames supra, p. 12, t. 22. — Acoridium 

 Williamsii Ames Proc. Biol. Soc. Wash. 19: 143 (1906). 



Grass, or rush-like tufted plants, in habit very similar to D. 

 tenellum. Fseudobulbs approximate, clustered, fusiform, 7.5 cm. 

 long, tapering from a slender base. Sheaths elongated, tubular, 

 maculate, acute, closely appressed to the pseudobulb. Leaf linear, 

 triangular in cross section, 25 cm. long, about 1 mm. thick, acute. 

 Peduncle below the inflorescence filamentous, somewhat shorter 

 than the leaf, from near the summit of which it appears to arise, 

 being for the most part enclosed by it. Inflorescence slender, 



