49,4 Ames and Quisumbing: Philippine Orchids, III 495 
prominent fleshy callus above the middle, about 7 mm long, light 
orange except the terminal horns which are mallow pink and 
the base which is white; middle lobe lanceolate or oblong-lan¬ 
ceolate, obtuse, 1.4 to 1.5 cm long, 0.6 to 0.7 cm wide at the 
widest portion. Disc provided with several distinct calli: near 
the base, between the side lobes, an obscurely 3-lobed plurituber- 
culate callus; at the base of the middle lobe a pair of slender 
sharp teeth and a longer thin high median keel which extends 
to the middle of the terminal lobe where it is continued by irreg¬ 
ular teeth and terminates in a fleshy callus (toothed or fringed 
at the base) which extends to the apex of the lip. Column 1 
to 1.3 cm long, white with a mallow pink base. 
Luzon, Manila, Bureau of Science orchid house, Bur. Sci. 
84550 Quisumbing, June 6 , 1931. The living plants were pre¬ 
sented to the junior author by Mr. Constinoble, of Del Carmen, 
Pampanga Province, Luzon, who collected them at Balete Pass, 
Nueva E'cija Province, Luzon, growing on tree trunks. 
The variety is characterized by the complete absence of trans¬ 
verse bars on the sepals and petals. It further differs from the 
species in its smaller floral segments and leaves. 
Genus GASTROCHILUS D. Don 
GASTROCHILUS CALCEOLARIS D. Don. Plates 2, 11, and 25. 
Gastrochilus calceolaris D. Don, Prodr. FI. Nep. (1825) 32. 
Saccolabium calceolare Lindl. in Wall. Cat. No. 7302, Gen. & Spec. 
Orch. (1833) Z23; S'ert. Orch. Frontisp. (1838) No. 6, in Bot. 
Reg. (1838) Misc. p. 75, No. 139, in Journ. Linn. Soc. 3 (1859) 
33; Griff., Notul. 3 (1851) 356, Itin. Notes (1848) 170, No. 869, 
Ic. PI. Asiat. 3 (1851) t. 334; Reichb. f. in Walp. Ann. 6 (1864) 
883; Hook, f,, FI. Brit. Ind. 6 (1890) 60; King and Pantl. in 
Ann. Roy. Bot. Gard. Calcutta 8 (1898) 225, t. 300; J. J. Sm., FI. 
Buitenzorg (Orch. Jav.) (1905) 632, Fig.-Atlas (1908) t. 472 (as 
Gastrochilus). , 
Aerides calceolare Sm. in Rees. Cycl. (1819) Addend. & Corrigend. 
Aerides leopardinum Wall, apud Lindl., Sert. Orch. (1838) No. 6, in 
synon. 
Gastrochilus sororms Schltr. in Fedde. Repert. 12 (1913) 315. 
Sarcochilus nepalensis Spreng. Syst. Veg. 3 (1826) 721. 
Epidendrum calceolare Buch.-Ham. apud D. Don, Prodr. FI. Nep. 
(1825) 32, in synon. 
Gastrochilus philippinensis Ames, Orch. 5 (1915) 231, in Merr. Enum. 
Philip. FI. PI. 1 (1925) 434. 
GASTROCHILUS. Labellum ventricoso-inflatum, sessile, indivisum, 
apice appendice rotundata papilloso-glandulosa erose crenata auctum. 
Perianthii foliola omnia distincta, subaequalia, patula. Columna brevissi- 
