apex, broadly cuneate at the base, 6—-7.2 cm. long, about 
2 cm. wide, coriaceous, with the mid-nerve prominent 
beneath; petiole short, sulcate, 5-10 mm. long. Inflo- 
rescences one or two, more or less surpassing the leaf, 
densely many-flowered, suberect to arcuate, about 9-14 
cm. long, subtended by a conduplicate spathe up to 1.5 
cm. long. Floral bracts very small, approximate, infun- 
dibuliform, acute. Flowers small, nodding, secund, cam- 
panulate, about 5 mm. long, membranaceous, on pedi- 
cellate ovaries which barely surpass the bracts. Sepals 
prominently carinate without, glabrous but with invo- 
lute ciliolate margins. Dorsal sepal strongly concave, 
oblong-ovate, acute, 3-nerved, about 4.7 mm. long and 
2mm. wide when expanded. Lateral sepals connate into 
an ovate-oblong concave lamina which is 6-nerved and 
divided almost to the middle into a pair of ovate-lanceo- 
late acute lobes, about 4.7 mm. long and 2.5 mm. wide. 
Petals much smaller than the sepals, oblong-cuneate, 
obliquely subtruncate to lightly retuse at the apex, 3- 
nerved, about 2.8 mm. long and 1.2 mm. wide above. 
Lip very small, tubular-concave in natural position, 
when expanded rather deeply 3-lobed, five-angled in out- 
line, about 1.5 mm. long and 1.75 mm. wide, cuneate 
at the base, 3-nerved; lateral lobes semiobovate, spread- 
ing; mid-lobe subquadrate in outline, about half as long 
as wide, shallowly retuse in front; disc with an obscure 
transverse thickening near the base. Column minute, 
about half as long as the petals, with a prominent fleshy 
foot. 
This species seems to be allied to Pleurothallis trilin- 
eata Lindl., but differs in having strongly connate lateral 
sepals, truncate petals and a retuse mid-lobe of the lip. 
Cuzco: Prov. of Paucartambo, Pillahuata, at 3000 meters altitude, 
epiphyte in rain-forest, December 12, 1942, C. Vargas 3030 (Tyre 
in Herb. Ames No. 65174). 
[101 ] 
