minal, nodding; peduncle about 3.5 em. long, sheathed 
at base by two small imbricating spathes; raceme about 
10 cm. long. Floral bracts triangular-lanceolate or del- 
toid, acuminate, up to 5.5 mm. long. Flowers fourteen, 
loose, rather small, with widely spreading segments. Se- 
pals fleshy. Dorsal sepal elliptic-oblong, acute with a dor- 
sal conical mucro, up to 12.5 mm. long and 5.1 mm. wide. 
Lateral sepals ovate-lanceolate, concave, oblique, acute, 
with a long fleshy dorsally erose cusp, up to 18 mm. long 
and about 6 mm. wide. Petals obovate-elliptic or broadly 
spatulate-cuneate, subobtuse, up to 12 mm. long and 5.8 
mm. wide, thinner than the sepals, minutely erose on the 
irregular margins, 3-nerved with the lateral nerves branch- 
ing. Lip adnate to the column nearly to its apex, dis- 
tinctly shorter than the lateral sepals, about 11 mm. wide 
across the lateral lobes when expanded; lateral lobes 
rounded-dolabriform, oblique, cordate at base, with the 
rounded outer margins minutely erose and the usually 
entire anterior margin nearly straight; mid-lobe porrect, 
subequal to the lateral lobes, subquadrate, slightly broad- 
er toward the apex, abruptly truncate in front, sinuately 
3-dentate with narrow triangular teeth of which the mid- 
dle tooth is slightly longer, fleshy-thickened and_ re- 
curved; disc mostly occupied in the center by a large 
subquadrate-ovate depressed fleshy callus. Column very 
short and stout, adnate to the center of the lateral sepals 
up to about its middle, terminating in an oblique trans- 
verse auricle on each side, about 7.7 mm. long in the 
middle of the back. 
Epidendrum birostratum recalls HE. Klotzscheanum 
Reichb.f. vegetatively, but the awned lateral sepals and 
the sinuately tridentate mid-lobe of the lip appear to be 
unique. 
Cuzco: Prov. Urubamba, Puyupata-Tuncapata, at 3200 meters al- 
titude, epiphyte in wet forest, August 6, 1942, C. Vargas 2927 (Tyrer 
in Herb. Ames No. 61745). 
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