ate, pale yellow. Sepals ringent, glabrous. Dorsal sepal 
elliptic-ovate or oblong-ovate, concave, obtuse or sub- 
acute, 3-nerved, 4—4.2 mm. long, 2-2.2 mm. wide. Lat- 
eral sepals entirely connate into a broadly ovate or 
round-ovate lamina which is deeply concave, 4-nerved, 
3-3.9 mm. long and about 2.3 mm. or less wide when 
expanded. Petals linear, widespreading, lightly falcate- 
decurved, obtuse or subacute, 1-nerved, with irregular 
or minutely erose margins, about 2.6 mm. long and 0.5 
mm. wide at the base. Lip oblong-ovate, very fleshy, 
minutely acute or apiculate, cordate at base, minutely 
erose, 3-nerved with the termination of the mid-nerve 
dilated and prominent beneath, about 2.1—-2.6 mm. long 
from a basal auricle to the apex and 1.4-1.6 mm. wide 
at the base. Column stout, abbreviated, characteristic 
of the genus. 
This little species is allied to Pleurothallis juninensis 
Schltr., but is much smaller throughout and lacks the 
prominently narrowed sepals of that concept. It sug- 
gests P. magnipetala C. Schweinf. (see below), but has 
horizontally spreading leaves and relatively smaller and 
minutely erose petals. 
Hvanvuco: Tingo Maria, epiphyte at 670 meters altitude, October 
29, 1948, J. B. Carpenter 103 (Type in Herb. Ames No. 65447). 
San Martin: on cliffs on top of slope east of Tingo Maria, at 625- 
1100 meters altitude, October 30, 1949-February 19, 1950, H. A. 
Allard 20820. 
Pleurothallis hirsutissima C. Schweinfurth sp. 
nov. 
Herba pusilla, epiphytica, caespitosa. Planta omnino 
(radicibus exceptis) dense hirsutissima. Caules breves, 
graciles, apice unifoliati, vaginis paucis tubulatis arctis 
dense hirsutis omnino vestiti. Folium ellipticum vel el- 
liptico-oblongum, sessile, acutum vel obtusum, omnino 
dense hirsutum, coriaceum. Inflorescentiae breves, fas- 
[ 94 | 
