t 
ORCHIDAOE^ HAr>CONENSES. 321 
disticha, is ( ?) Cestichis Merrillii Ames. Lindley's Liparis gregaria, if I am not 
mistaken, is referable to the present species. 
Mauritius, UouiLon, Ceylon. (Distribution uncertain as several species wrongly 
referred to (J. disticha by authors make an examination of material necessary in 
giving range. ) 
Cestichis (§ Laxiflorae) halconensis Ames ap. nov. 
A very distinct bifoliate species, about \\ dm. liigh. Pseudobnll)s about 
1.5 cm. long, somewhat cylindrical, covered by 4 or 5 distichous, acute 
sheatliri wlion imnuiture. 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 Llie leaves. Lowcrmosi 
bracts elongated, linear-acute, 1—1.5 cm. long, those of the inflorescence 
about half as long as the slender podiools. Pedicels of the lowermost 
flowers 1.5 cm. long. Inflorescence loosely many -flowered. Flowers 
gi-ass-green, turning yellow with age. Ijateral sepals obhuig, very obtuse, 
5 mm. long, 2 mm. wide. Tipper 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; disUil margin crenulate and 
obscurely bhint-mucronate; in the middle of the claw is a fleshy sub- 
cucullate callus. Column -3 nun. long, rather slender, strongly arcuate 
near the summit. 
Terrestrial in ridge forest at 1,200-2,200 ft. alt. on Mount Halcon, Xov. 8, 
1!)06, Meyrill (No. 5790). 
Cestichis Merrillii Ames Orchiclace*, fasc, 1, p. 11, t, 3 (1905). 
Epiphyte in mossy forest at 2,800 ft. alt. on Mount Halcon, flowers brownish- 
yellow, Xov. 12, lOOfi, Merrill (No. 5G17). 
The Mount Halcon plant.s have smaller fhnvers than the type. 
Cestichis philippinensis Ames Orchidaceai, fasc. 1, p. 7, t. 2 (1005). 
Epii)hyte at G,800 ft. alt. on Mount Halcon, flowers brownish-yellow, Nov., 
1900, Merrill (No. 5704). 
Tlie lanceolate, acute lahellnm of this species is very chnrnoteristic. 
OBERONIA Limll. 
Oberohia McGregorii Ames sp. nov. 
Closely allied with 0. dUolata 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, ensiforui, about 4 cm. long, acute. Peduncle relatively stout, 
bracteate, minutely scurfy pubescent. Bracts linear-lanceolate, acumi- 
nnto, acute, ciliate-pubescent, about 2 mm. long, excL\>ding the pedicels of 
the flowers. Ovaries finely pubescent. Lateral sepals ovate-lanceolate, or 
triangular-lanceolate, acute, ciliolate O.io mm. long. Upper sepal nearly 
elliptical, subobtuse, 0.75 mm. long, ciliolate. Petals linear-oblong, 
rounded at tlie tip, much sliortcr and narrower than the sepals, minutely 
ciliolate. Labellum pandurate (or oblong, constricted at the middle), 
