coriaceous, with the mid-nerve prominently exserted be- 
neath, 3.8-5.7 cm. long, up to 1.2 cm. wide; petiole 
slender, channelled. Racemes one or two to astem, erect 
or nearly so, usually much surpassing the leaf, slender, 
densely many-flowered, up to 18 em. long. Flowers very 
small, strongly secund, yellow, submembranaceous, bi- 
labiate, nodding. Dorsal sepal elliptic-ovate, subacute to 
obtuse, 3-nerved, lightly convex, shortly connate with 
the lateral sepals at the base, about 8 mm. long and 2 
mm. wide. Lateral sepals connate into a deeply concave 
lamina which is bidentate at the tip; each sepal oval- 
ovate, subacute, 3-nerved, lightly oblique, about 2.25 
mm. long and 1.75 mm. wide. Petals many times smaller 
than the sepals, transversely rhombic-suborbicular, 
broadly rounded at the apex, fleshy-thickened upward, 
concave, 3-nerved, about 0.6 mm. long and 1 mm. or 
more wide. Lip smaller than the petals, transversely 
obovate-rhombic, concave, obtuse, provided above the 
middle with a fleshy transverse bilobed callus, about 0.56 
mm. long and 0.7 mm. wide. Column minute, strongly 
dilated upward. 
This species is allied to the Central American Stelis 
despectans Schltr., but varies in having a very different 
lip. 
Hvanvuco: Carpish between Hudnuco and Tingo Maria, at 2500- 
2800 meters altitude, March 2, 1947, Ramén Ferreyra 1748 (Tyrr in 
Herb. Ames No. 65281). 
Stelis Hallii Lindl. var. minor C. Schweinfurth 
var. nov. 
Herba caespitosa, pusilla, statura omnino minore et 
racemo non valde fractiflexo et petalis non trilobulatis a 
specie differt. 
Plant caespitose, small, up to 9.5 em. high. Stems 
crowded, abbreviated, about 3.5 cm. or less tall, entirely 
concealed by two or three close tubular imbricating 
[ 18 ] 
