TROPICAL AMERICAN ORCHIDS 
centia subumbelliformis, contracta. Sepala lateralia lanceo- 
lato-linearia, longe acuminata. Sepalum dorsale et petala 
anguste lanceolata, caudata. Labellum simplex, lineare, 
breviter acuminatum, sub medio papillarum fasciculo or- 
natum. Columna gracilis. 
Plant vegetatively very small for the genus, 6.1 cm. 
tall to the tip of the inflorescence. Roots fibrous, flexuous, 
glabrous. Leaves five, congested at the base of the plant, 
equitant, spreading, semielliptic to linear-oblong, 9.5-29 mm. 
long, 2.5-4.5 mm. wide, more or less oblique, sharply acute, 
densely rugose when dry, and apparently fleshy in the living 
condition, articulated to imbricating sheatbs with broad 
scarious margins. Scape about 4 cm. long, emerging from the 
axil of a sheath, slender, flexuose-suberect, with three re¬ 
mote sheaths which have infundibuliform bases and acu¬ 
minate apices. Inflorescence an umbelliform raceme, 2.3 
cm. long, 3.4 cm. across in the dried plant, apparently semi- 
globose. Rachis 5 mm. long, densely 13-flowered. Floral 
bracts narrowly lanceolate, acuminate, concave, horizon¬ 
tally spreading. Pedicels filiform, widely spreading, with the 
ovary 7-7.5 mm. long. Flowers large for the plant, membra¬ 
naceous in the dried specimen. Lateral sepals lanceolate- 
linear, long-acuminate with conduplicate apices, mostly 
free but very slightly connate at the saccate base, 12.2-13 
mm. long, 1 mm. wide below, 1-nerved or indistinctly 2- 
nerved. Dorsal sepal narrowly lanceolate, caudate-acu¬ 
minate, strongly conduplicate in natural position, 9.7-10.1 
mm. long, 1.8-2 mm. wide below, 3-nerved, conspicuously 
unicarinate on the back. Petals similar to the dorsal sepal 
but smaller, 9-10 mm. long, about 1.5 mm. wide below, 
caudate, 3-nerved in the lower part. Labellum linear, some¬ 
what contracted near the base, 5.5 mm. long, about .9 mm. 
wide above the middle, short-acuminate, tapering to the car¬ 
inate tip, 1-nerved, a clump of low approximate papillae 
near the base. Column slender, about 3.3 mm. long, char¬ 
acteristic of the genus. Anther deeply saccate, complanate- 
lanceolate-ovoid. Stipe of the pollinia strongly triangular- 
dilated above. 
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