oblong-elliptic, acute or obtuse, cuneate below, up to 
6.5 cm. long and 1.8 cm. wide. Inflorescence solitary, 
nearly twice as long as the leaf, about 12.2 cm. or less 
long, suberect, densely or subdensely many-flowered 
above, looser below. Flowers commonly secund, rather 
small, yellow-green, with spreading segments. Sepals 
minutely cellular-papillose within. Dorsal sepal narrowly 
lanceolate, long-narrowed to an acute apex, concave be- 
low, up to 9.8 mm. long and 2.6 mm. wide near the base. 
Lateral sepals lanceolate, oblique and gently recurved 
above, up to 9.9 mm. long and 2.9 mm. wide. Petals 
much smaller than the sepals, linear, acute, prominently 
1-nerved throughout, about 4.6 mm. long, up to 1 mm. 
wide. Lip somewhat longer than the petals, sigmoid 
when viewed from the side in natural position, pandurate- 
oblong, about 5.9 mm. long when expanded, up to 2.1 
mm. wide above the middle, obtuse or subacute; basal 
portion very shortly clawed, subquadrate-oblong, with a 
pair of low keels that extend onto the basal part of the 
anterior portion; anterior portion slightly longer and 
broader, oblong-ovate. Column small, shorter than the 
petals, about 3 mm. long, narrowly winged on each side, 
with a short trilobulate wing at the apex, produced into 
a short foot. 
This species superficially resembles Pleurothallis rubens 
Lindl., but commonly shows a creeping rhizome produc- 
ing stems in pairs, has very narrow petals and a lip which 
differs in several details. 
Cuzco: Prov. of Paucartambo, Pillahuata, at 2800 meters altitude, 
epiphyte, January 25, 1945, C. Vargas 4956 (Tyee in Herb. Ames 
No. 65385); Same locality, at 3200 meters altitude, epiphytic in rain 
forest, ‘‘ceja de montafia,’? December 11, 1942, C. Vargas 3006a. 
Pleurothallis ciliata Know/. & Westc. var. abbre- 
viata C. Schweinfurth var. nov. 
Herba variabilis, inflorescentiis abbreviatis et floribus 
[ 46 ] 
