mm. high at the back, produced at a right angle into a 
stout subequally long foot. 
The variety differs from the type in being a more ro- 
bust plant with strict few-branched stems, commonly 
much larger leaves, differently colored flowers and a lip 
having a relatively larger anterior portion. 
Cuzco: Prov. of Paucartambo, Pillahuata, at 3400 meters altitude, 
epiphyte in rain-forest, “‘ceja de montana,’’ December 11, 1942, C. 
Vargas 3007 (Tyrer in Herb. Ames No. 63338). 
Pleurothallis graciliscapa C. Schweinfurth sp. nov. 
Herba epiphytica, caespitosa, pro sectione pusilla. Rhi- 
zoma repens ut videtur. Caules pergraciles, suberecti vel 
paulo flexuosi, apice unifoliati. Folium late patens, ova- 
tum vel oblongo-ovatum, basi valde cordatum, saepis- 
sime acuminatum. Inflorescentiae abbreviatae, fascicula- 
tae, uniflorae. Flores perparvi, bilabiati. Sepalum dorsale 
elliptico-ovatum vel oblongo-ovatum, concavum, triner- 
vium. Sepala lateralia in laminam late ovatam profunde 
concavam connata. Petala linearia, leviter faleato-decur- 
va, margine leviter erosa. Labellum oblongo-ovatum, 
valde carnosum, apice minute acutum vel apiculatum, 
basi cordatum, trinervium. Columna abbreviata. 
Plant epiphytic, caespitose, up to 15.5 em. high. Rhi- 
zome apparently creeping (only a fragment remains). 
Roots fibrous, filiform, glabrous. Stems very slender, 
about 4-13.2 cm. long, erect to irregularly flexuous, fur- 
nished at the base with one or two long close, tubular, 
evanescent sheaths and with a similar longer one below 
the middle. Leaf solitary, sessile, commonly horizontally 
spreading, ovate or oblong-ovate, deeply cordate at base 
(when mature), acute or acuminate with a minutely tri- 
denticulate apex, 2.8-4 em. long from the apex to the 
tip of the basal auricles, 1.1-1.7 cm. wide, chartaceous 
in the dried specimen. Inflorescences abbreviated, 1- 
flowered, about five or less. Flowers very small, bilabi- 
[ 93 ] 
