plicate, dorsally carinate. Petals much shorter than the 
sepals, very obliquely elliptic-lanceolate, lightly sigmoid, 
acute or acuminate, l-nerved, about 2.2 mm. long and 
0.50-0.75 mm. wide, with irregular upper margins. Lip 
simple, ovate or rhombic-ovate with the lower sides in- 
curved in natural position, broadly obtuse, broadly cu- 
neate at the base, about 1.5 mm. long and 1 mm. wide 
when expanded, 3-nerved through the lower half, densely 
minute-papillose throughout except near the base. Col- 
umn about one half as long as the petals, stout, arcuate. 
Pleurothallis inaequisepala suggests the Ecuadorian P. 
microcharis Schltr. in habit. Its smooth-margined sepals 
and simple lip distinguish this species from P. chamaele- 
panthes Reichb. f. 
Cuzco: ‘‘Valle de Santa Ana, alturas del Chaco, 3666 mtrs,”’ 
August 12, 1928, F. L. Herrera 2125 (C. Bues coll.). (Tyrer in U.S. 
Nat. Herb. No. 1422530; Dupticare type in Herb. Ames No. 60985), 
Plieurothallis lanceolata Lindley var. gracilis C. 
Schweinfurth var. nov. 
Herba gracilis, folio minore et racemo longiore et se- 
palis lateralibus omnino coalitis et labello non naviculari 
a specie differt. 
Plant slender, variable. Stems 4.5-11 cm. tall. Leaf 
prominently petioled like that of the type; lamina ellip- 
tic to narrowly elliptic-oblong, up to 10.5 em. long and 
2.7 cm. wide. Raceme commonly much surpassing the 
leaf, sometimes over 20 cm. long (tip incomplete). Se- 
pals about 2.1 em. long, lateral ones entirely connate 
(not bidentate). Lip slightly concave, but not navicular 
as in the species. 
This collection perhaps represents a new species, but 
without having examined a flower from the type of Pleu- 
rothallis lanceolata, such treatment appears to be unwise 
at present. 
[ 182 | 
