ORCH1DACE.E HALCONENSES: AN ENUMERATION OF THE 
ORCHIDS COLLECTED ON OR NEAR MOUNT HALCON, 
MINDORO, CHIEFLY BY ELMER D. MERRILL. 
By Oakes AiiLS, A. M., F. L. S. 
Most of the orchirds eniniioratcd in this ])aper wore collected b}' Elmer 
I). Merrill in Mindoro at higli altitudes on Mount Ilaleon, In addition^ 
those species have been included here which were found near Mount 
Halcon during April and !^Tay, 1905, by B. C. McGregor, and in June, 
1906, by M, L. Merritt. Among the species are many known to come 
from Java, Sumatra and Borneo ; and, aside from the new ones, which 
constitute about half of the orchids in this paper, there are several 
interesting additions to the Philippine flora. 
I have adopted the sequence of genera proposed by Pfiizer in Englcr 
S PraniVs "Die natiirliehcn Pflanzenfamilion" and have arranged the 
species alphabetically under their respective genera. The notes relative 
to the geographical distribution of species tliat occur outside of the Phil- 
ip2)inc Islands have been made from lists and floras; therefore tliey are 
not definitive, as closely allied species are not infrequently confused by 
authors, and their ranges consequently exaggerated. 
The types of the new species herein described are in the herbarium of 
the Bureau of Science at Manila. Usually cotypcs are to be found in 
my own herbarium. 
NEUWIEDIA Bl. 
N. veratrifolia Bl. in TToov. & Dc Vriosc, Tijdsehr. 1 : 142 (1834). 
Terrestrial, ritige forest, at 2,300 ft. alt. on Jlount Ilalcou, flo\\crti yellow, 
Nov. 8, 1900, Merrill (No. 5681). 
APOSTASIA Bl. 
Apostasia Wallichii R. Br. Wall. Cat. 4448 (1S28). 
Terrestrial in ridgo forest at 3,000 ft. alt. on Mount Halcon, flowers yellowish 
(old), probably white when young, Nov. 10, 1006, Merrill (No. 5521). Terrestrial 
in humid forest on ridge at about 1,000 ft. alt. on !Mount Ilalooii, flowers odorless, 
yellowisli white, Nov. 2, 1906, MerHll (No. 5639). 
Nepal, Assam, Khasia, Perak, Ceylon, Penang, Sumatra, Borneo, Java, New 
Guinea. Doubtfully ascribed to Luzon, P. I. 
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