0RCHIDACE2E HALCONENSES. 
335 
being fully 5 mm. long. Floral bract tubular, obliquely truncate. Flower 
straw-yellow, relatively large. Lateral sepals narrowly lanceolate, acute, 
3-nerved, 8 mm. long, 2 mm. wide below the middle, margin minutely 
ciliolate. Upper sepal similar to the laterals, about equally long. Petals 
linear-oblong, subspathulate,, acute, 1-nerved, 3 mm. long, about 0.75 mm. 
wide. Labellum linear-lanceolate, 3.5 mm. long, about 1 mm. wide. 
Column 1 mm. long, with a tooth or protuberance in front near the base 
or below the middle. 
Epiphyte in deep shaded ravine at 3,000 ft. alt. on Mount Halcon, Nov. 27, 
1906, Merrill (No. 5796). 
Pseudobulbs as in B. cernuum (Bl.) Lindl. 
Bulbophyllum (§ Monanthaparva) pleurothalloides Ames sp. nov. 
Ehizome obscure. Pseudobulbs 3 mm. long, much depressed, forming 
a chain. Leaves about 1 cm. long, 2—4 mm. wide, oblaneeolate to spath- 
ulate, obtuse, minutely apiculate, contracted below into a slender petiole. 
Scapes filiform, elongated, exceeding the leaves, 3 cm. long, with scarious 
sheaths at base, and with a tubular obliquely truncate bract subtending 
the solitary, minute, brownish-yellow flower. Lateral sepals lanceolate, 
acute, about 4 mm. long, 2.5 mm. wide, 3-nerved. Upper sepal similar 
and equal to the laterals. Petals lanceolate, 2 mm. long, 0.75 mm. wide. 
Labellum lanceolate-cordate, obtuse, or subsagittate, 2 mm. long, 1 mm. 
wide at base, about 0.5 mm. wide near the tip. Column 1 mm. long. 
On mossy trunks of trees at 4,500 ft. alt. on Mount Halcon, Nov. 14, 1906, 
Merrill (No. 6128). 
In habit allied to B. cernuum (Bl.) Lindl. but with very different leaves. 
The general aspect of the plant when in flower recalls some species of Pleuro- 
thallis. 
Bulbophyllum vagans Ames and Rolfe Orcliidaceae, fasc. 2 (1907) ined. 
Epiphyte on mossy tree trunks in ridge forest at 6,500 ft. alt. on Mount Hal- 
con, flowers odorless, straw colored, Nov. 21, 1906, Merrill (No. 6217). 
Endemic in the Philippines. 
Bulbophyllum vagans var. angustun Ames var. nov. 
Differs from the type in its linear-lanceolate, acuminate, acute, 9-13 
cm. long, 1-1.5 cm. wide leaves. 
Epiphyte in mossy forest on tree trunks at 650 ft. alt. on Mount Halcon, 
flowers greenish yellow, Nov. 21, 1906, Merrill (No. 6218). 
This variety is very remarkable in that it agrees with B. vagans in all respects 
except foliage. The leaves of B. vagans are oblong-ovate, abruptly rounded at 
base and subobtuse, 4-7 cm. long, 3 cm. wide. «■ 
Bulbophyllum sp. 
At 2,950 ft. alt. on Mount Halcon, June 15-27, 1906, M. L. Merritt (No. 4360). 
A single specimen insufficient for description. 
