ORCHIDACEiE IIALCONENSES. 
337 
broadly spathulate, about 2.2 cm. long, 1.5 cm. wide, very obtuse. 
Labellum 3-lobed ; middle lobe oblong, rounded at the tip, 9 mm. long, 
about 7.5 mm. wide; lateral lobes somewhat similar to the middle lobe, 
but shorter, 4-5 mm. long, 6.5 mm. wide at base. Spur slender, 3.5 
cm. long. Column about 7 mm. long, rather stout. 
Epiphyte at about 2,500 ft. alt. on forested slopes of Mount Halcon, Nov. 28, 
1906, Merrill (No. 5698). 
THRIXSPERMUM Lour. 
Thrixspermum McGregorii Ames sp. nov. 
Stem about 5 mm. in diameter. Leaves oblong, falcate, acute or sub- 
acute, about 12 cm. long, about 1.5 cm. wide. Scapes very slender, 
almost filiform, shorter than the leaves, about 6 cm. long, naked, bearing 
a short raceme of minute flowers. Floral bracts minute, triangular, 
•acute. Lateral sepals ovate, subacute, 1.5 mm. long, less than 1 mm. 
wide near the middle. Upper sepal strongly concave; narrower than the 
laterals, 1.5 mm. long. Petals somewhat oblanceolate or spathulate, 
obtuse, slightly exceeding 1 mm. in length, 0.5 mm. wide. Labellum 
about 1 mm. long, 3-lobed; lateral lobes semi-rotund, erect, 0.5 mm. 
long and about 0.5 mm. wide ; middle lobe with a minute lobule on each 
side, one in front of each lateral lobe, otherwise fleshy, minute, blunt. 
Flowers when spread out 3 mm. across. 
Growing on fallen tree near Balete, Baco River, April 23, 1905, R. C. McGregor 
(No. 288). 
This is a very small-flowered species of a most puzzling group, closely allied to 
Dendrocolla Zollingeri Reiclib. f. 
Thrixspermum sp. 
Binabay River, Nov., 1906, Merrill (No. 5539). A single specimen. 
Thrixspermum sp. 
Mount Halcon, Nov. 1906, Merrill (No. 5691). Specimen in fruit. 
