large for the subgenus, oblong-lanceolate or linear-ellip- 
tic, acute, normally 1-nerved, about 3.5 mm. long and 
1 mm. or more wide, entire or locally minutely erose. 
Lip fleshy, narrowly ovate-triangular, shallowly cordate 
at the base, acute or subacute, 3-nerved, about 2.5 mm. 
long in greatest length and 1.5 mm. wide at the base. 
Column very short and stout. 
This species, which belongs to a large and perplexing 
group of Pleurothallis, appears to be quite new to Peru. 
The relatively large petals are distinctive, as well as the 
generally sharply reflexed leaves. 
Cuzco: Prov. of Quispicanchis, Hda. Itio, Marcapata, in stony or 
rocky open places, at 2000 meters altitude, January 27, 1943, C. 
Vargas 8128 (Tver in Herb. Ames No. 63357).; Prov. of Quispi- 
canchis, Cadena, epiphyte at 1020 meters altitude, July 29-30, 1946, 
C. Vargas 6221.; Prov. of Paucartambo, S. Pedro to S. Isabel, at 
1350 meters altitude, on old tree trunks, flowers dull yellow, Decem- 
ber 6, 1947, C. Vargas 6784. 
Pleurothallis pantasmoides C. Schweinfurth sp. 
nov. 
Herba epiphytica, crassa. Caules leviter arcuati, basi 
teretes, supra sensim dilatati et sursum conspicue bialati, 
cum centro in folii partem basalem prominenter extenso. 
Folium rigide erectum, elliptico-oblongum, obtusum, 
basi cuneatum cum lateribus in caulem decurrentibus. 
Inflorescentiae axillares, decurvae, perbreves, circa quat- 
tuor, pauciflorae. Flores parvi, carnosi, extus pubescen- 
tes. Sepalum dorsale oblanceolato-oblongum, late obtu- 
sum. Sepala lateralia in laminam breviorem suborbicu- 
larem connata. Petala minora, lanceolato-rhombica, apice 
late truncata vel truncato-retusa, supra minute denticu- 
lata. Labellum carnosissimum, in positu naturali arcuato- 
recurvum, ovatum ut videtur, apice late rotundatum. 
Columna parva, arcuata, supra abrupte alato-dilatata. 
Plant stout, epiphytic, up to 84 cm. tall. Rhizome 
[ 98 ] 
