0RCHIDACE2E HALCONENSES. 321 
disticha, is (?) Cestichis Merrillii Ames. Lindley’s Liparis gregaria, if I am not 
mistaken, is referable to the present species. 
Mauritius, Bourbon, Ceylon. (Distribution uncertain as several species wrongly 
referred to C. disticha by authors make an examination of material necessary in 
giving range.) 
Cestichis (§ Laxiflorae) halconensis Ames sp. nov. 
A very distinct bifoliate species, about 3 dm. high. Pseudobulbs about 
1.5 cm. long, somewhat cylindrical, covered by 4 or 5 distichous, acute 
sheaths when immature. Leaves oblong-lanceolate, very acute, 15-20 cm. 
or more long, about 3 cm. wide, contracted into a winged petiole. 
Peduncle graceful, strongly bialate, exceeding the leaves. Lowermost 
bracts elongated, linear-acute, 1—1.5 cm. long, those of the inflorescence 
about half as long as the slender pedicels. Pedicels of the lowermost 
flowers 1.5 cm. long. Inflorescence loosely many-flowered. Flowers 
grass-green, turning yellow with age. Lateral sepals oblong, very obtuse, 
5 mm. long, 2 mm. wide. Upper sepal similar to the laterals. Petals 
linear, 5 mm. long, about 1 mm. wide. Labellum 5.5 mm. long, subor- 
bicular from an oblong-cuneate base ; distal margin crenulate and 
obscurely blunt-mucronate ; in the middle of the claw is a fleshy sub- 
cucullate callus. Column 3 mm. long, rather slender, strongly arcuate 
near the summit. 
Terrestrial in ridge forest at 1,200-2,200 ft. alt. on Mount Haleon, Nov. 8, 
1906, Merrill ( No. 5799). 
Cestichis Merrillii Ames Orehidace®, fase. 1, p. 11, t. 3 (1905). 
Epiphyte in mossy forest at 2,800 ft. alt. on Mount Haleon, flowers brownish- 
yellow, Nov. 12, 1906, Merrill (No. 5617). 
The Mount Haleon plants have smaller flowers than the type. 
Cestichis philippinensis Ames Orchidace®, fase. 1, p. 7, t. 2 (1905). 
Epiphyte at 6,800 ft. alt. on Mount Haleon, flowers brownish-yellow, Nov., 
1906, Merrill (No. 5764). 
The lanceolate, acute labellum of this species is very characteristic. 
OBERONIA Lindl. 
Oberonia McGregorii Ames sp. nov. 
Closely allied with O. ciliolata Hook f. Plants caulescent, when in 
flower about 12 cm. high from base of stem to tip of the densely flowered 
cylindrical spike. Leaves distichous, obliquely spreading from below 
the middle, ensiform, about 4 cm. long, acute. Peduncle relatively stout, 
bracteate, minutely scurfy pubescent. Bracts linear-lanceolate, acumi- 
nate, acute, ciliate-pubescent, about 2 mm. long, exceeding the pedicels of 
the flowers. Ovaries finely pubescent. Lateral sepals ovate-lanceolate, or 
triangular-lanceolate, acute, ciliolate 0.75 mm. long. Upper sepal nearly 
elliptical, subobtuse, 0.75 mm. long, ciliolate. Petals linear-oblong, 
rounded at the tip, much shorter and narrower than the sepals, minutely 
ciliolate. Labellum pandurate (or oblong, constricted at the middle), 
