TROPICAL AMERICAN ORCHIDS 
multo minus, obovato-ellipticum, obscure trilobatum. Gy- 
nostemium perparvum. 
Plant caulescent, epiphytic. Stem 4 ft. tall, straight or 
more or less curved, usually with several short lateral 
branches, 6 mm. in diameter (at the base of our specimens), 
entirely concealed by distichous imbricating leaf-sheaths, 
woody. Leaves lanceolate-linear, 5.6-13.5 cm. long, 9-14 
mm. wide below (those at the summit of the branches or on 
the stems of the branches often much smaller, rarely 9 mm. 
long, 4.5 mm. wide), spreading, obliquely bilobed at the 
rounded apex, clasping at the base, chartaceous, the mid¬ 
nerve sulcate above and conspicuously carinate beneath. 
Inflorescences solitary to several, rising from the leaf-axils. 
Peduncles 1-flowered, about 3.5 cm. long, mostly concealed 
by loose scarious tubular sheaths. Flower medium-sized. 
Lateral sepals oblong-lanceolate, 1.63-1.85 cm. long, 4.1-5 
mm. wide below, acute and dorsally keeled at the apex, 
lightly falcate, with five more conspicuous nerves. Dorsal 
sepal similar, oblong, 1.75-2.12 cm. long, 3.95-4.9 mm. wide, 
acute, dorsally carinate at the apex. Petals cuneate-oblong, 
1.31-1.54 cm. long, 3.9-4.5 mm. wide above the middle, 
acute or acuminate, with a dorsally subcarinate apex, 
lightly oblique, 5-nerved. Labellum relatively very small, 
erect, and clasping the column in natural position, gently 
recurved with tubular-erect sides, 5.5-6.1 mm. long, 3.2-3.5 
mm. across when expanded, obovate-elliptic in outline, 
lightly 3-lobed above the middle; lateral lobes distinct only 
at their broadly rounded apex; terminal portion rounded- 
triangular, fleshy in texture, with a recurved obtuse apex. 
Disc prominently 5-nerved with a small fleshy rounded 
callus a little below the middle. Column very short, about 
2.8 mm. long at the back, with a shorter but prominent foot. 
Maxillaria parvilabia resembles Camaridiurn costari- 
cense Schltr. and C. simile Schltr. in habit, but the lip is very 
distinctive. 
Costa Rica, Province of San Jose, La Palma, Paul C. 
Standley 32939, February 3, 1924. About 1600 metres al¬ 
titude. “On mossy tree trunk; stems 4 ft. high; segments 
canary yellow; lip dark red; common.” (Type in Herb. Ames 
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