130 ORCUIBACEM 



tius. Petala lineari-oblonga, obtusa, 1-nervia, 2.5 mm. longa. 

 Laoellum ad basim callo cucullato instructum, 4 mm. longum, 

 2.5 mm. latum, 5-dentatum ad apicem ; dens medius lateralibus 

 multo major, triangularis, breviter bifidus ; auriculae oblongae co- 

 lumnam amplectentes. Columna ad apicem laciniis duabus obtusis 

 instructa. Pollinia 4, pyriformia per paria cohserentia. 



Mts. back of San Fernando, common name ali-man-dog, alt. 

 about 2000 ft. above sea-level, Island of Sibuyan, July 9, 1904, 

 R. C. McGregor (no. 14). A single specimen in the herbarium 

 of the Bureau of Science, Manila. 



M. QUADRIDENTATA comb. nov. — Microstylis quadri- 

 dentata Ames Philippine Journ. Sci. (Bot.) 2 : 320 (1907). 



Flowers similar in structure to those of M. oculata (Reichb. f.) 

 Kuntze. Plants 1.5 dm. tall. Leaves about 6, narrowly lanceo- 

 late, very acute, 7 cm. long, 6 mm. wide, 

 dilated into a sheathing base below the 

 short petiole. Peduncle graceful, exceeding 

 the leaves. Bracts linear, acute, the lower- 

 most 4-5 mm. long, exceeding the short 

 pedicels. Flowers purplish, in a rather 

 strict raceme. Lateral sepals elliptic-ovate, 

 very obtuse, rounded at the tip, 2 mm. long. 

 Upper sepal similar to the laterals. Petals 

 Malays quadhidextata linear-oblong, about 2 mm. long, obtuse. 

 Labellum auriculate, auricles triangular- 

 obtuse, less than 1 mm. long ; blade of the labellum about 2 mm. 

 long, with a minute callus at base, shortly cleft at the apex, biden- 

 tate on each side at about the middle, distal tooth of each pair 1 

 mm. long, narrower and longer than the basal teeth. 



Terrestrial in damp shaded ravine at 3000 ft. alt. on Mt. Hal- 

 con, E. D. Merrill (no. 5805). — Terrestrial in forest, alt. 2400 

 ft., on Mt. Halcon, November 10, 1906, E. D. Merrill (no. 5818). 



Endemic. 



