ORCHIDACEAE IIALCONENSES. 
317 
Dendrochilum (S Acoridium) bicallosum Ames Orchidacese, fasc. 2 (1907) 
ined. 
Epiphyte in ridge forest at 2,500 ft. alt. on Mount Halcon, flowers brownish 
red, Nov. 28, 1906, Merrill (No. 5812). 
Var. minor Ames Orchidaceae, fasc. 2 (1907) ined. 
On ledge in ridge forest at about 1,500 ft. alt. on Mount Halcon, flowers pale 
salmon color, odorless, Nov. 8, 1906, Merrill (No. 5663). 
Dendrochilum (§ Acoridium) exile Ames Orchidaceae, fasc. 2 (1907) ined. 
Epiphyte at 6,800 ft. alt. on Mount Halcon, flowers greenish yellow, odorless, 
Nov. 15, 1906, Merrill (No. 5721). 
Related to D. tenellum Ames and D. Williamsii Ames, from which it differs in 
its much shorter leaves and very different labellum. 
Dendrochilum (§ Platyclinis) glumaceum Hindi. Bot. Reg. 1841, Misc. 
p. 23. 
Flowers white, slightly fragrant, Mount Halcon, June 15-27, 1906, M. L. 
Merrit (No. 4373). 
Dendrochilum (§ Acoridium) hastatum Ames Orchidaceae, fasc, 2 (1907) 
ined. 
On bases of trees, flowers purplish, at 6,800 ft. alt. on Mount Halcon, Nov., 
1906, Merrill (No. 5759).— Near same locality, June 15-27, 1906, M. L. Merritt 
(No. 4411). 
Dendrochilum hastatum is clearly distinguished from all other species known 
to be natives of the Philippines by its hastate labellum. 
Dendrochilum (§ Acoridium) Hutchinsonianum Ames Orchidaceae, fasc. 2 
( 1907 ) ined. 
In dense mossy thickets, on exposed ridge, both terrestrial and epiphytic at 
8,000 ft. alt. on Mount Halcon, flowers flesh colored, odorless, Nov., 1906, Merrill 
(No. 5813). 
D. Hutchinsonianum is related to D. pumilum Reichb. f. from which it differs 
in its larger proportions and flowers. 
Dendrochilum (§ Platyclinis) magnum Reichb. f. Walp. Ann. 6: 240 
(1861). 
Epiphyte at 6,000 ft. alt. on Mount Halcon, flowers pale brownish, odorless. 
Nov. 15, 1906, Merrill (No. 5730). — Epiphyte in mossy forest on Mount Halcon, 
Nov., 1906, Merrill (No. 5611). 
Although the labellum is not 3-lobed in any of the specimens examined, I am 
of the opinion that my determination of the Mount Halcon material, while pro- 
visional, is the only safe one, waiting an examination of the type of D. magnum. 
From a sketch of the labellum in Lindley’s herbarium at Kew it would seem 
highly probable that the 3-lobed character was the result of malformation or 
injury. 
Distribution obscure. 
Dendrochilum (§ Acoridium) mindorense Ames Orchidaceae, fasc. 2 (1907) 
ined. 
Epiphyte with greenish yellow flowers, Mount Halcon, Nov. 15, 1906, Merrill 
(No. 5729).— In same locality, Nov., 1906, Merrill (No. 5795). 
Allied to D. recurvum Ames. 
Dendrochilum (§ Acoridium) pumilum Reichb. f. Bonpl. 3: 222 (1855). 
Mount Halcon, Nov., 1906, Merrill (No. 6196). 
Endemic in the Philippines. 
