slender, 1-leaved at the apex, 11.5-13.7 cm. long, with 
about three very close tubular sheaths of which the up- 
permost is elongate and separated from the others. Leaf 
erect-ascending, shortly petioled, about 9.3-10.8 cm. 
long; lamina narrowly elliptic-oblong, obtuse, shortly 
cuneate at the base, subcoriaceous, about 9 em. long and 
1.6 em. wide. Racemes fascicled, strict or spreading, 
subequaling or surpassing the leaf, 14-16 in number, 
about 7.5-15 cm. long, subdensely many-flowered. 
Floral bracts inconspicuous, infundibuliform, acute, 
scarious, spreading. Flowers very small, either distichous 
or secund, glabrous. Sepals connate at the base, mem- 
branaceous. Dorsal sepal ovate, sharply acute, 1-nerved 
with very short indistinct lateral nerves near the base, 
about 2 mm. long and 1.2 mm. wide. Lateral sepals 
closely similar, slightly oblique. Petals much smaller, 
obovate-oval, subacute with a thickened apex, 1-nerved, 
about 1 mm. long. Lip slightly larger than the petals, 
strongly concave, subsessile, suborbicular-ovate when 
expanded, sharply acute, 3-nerved, lightly retuse on each 
side in front, about 1.2 mm. long and 1.1 mm. wide, 
lightly transverse-thickened near the base. Column rela- 
tively prominent, strongly clavate from a slender base, 
nearly as long as the petals. 
This species appears to be allied to the Bolivian Stelis 
euspatha Reichb.f., but has very different petals and lip. 
Cuzco: Prov. of Quispicanchis, Hda. Itio, Marcapata, at 2000 me- 
ters altitude, in sunny rocky places, perianth pale yellowish white, 
January 27, 1943, C. Vargas 3116 (Tyre in Herb. Ames No. 65209). 
Masdevallia grandiflora C. Schweinfurth sp. nov. 
Herba epiphytica, caespitosa, parva, cum flore com- 
parate magno. Caules approximati, breves, vaginis duabus 
tubulatis nigris omnino tecti. Folium unicum, erectum, 
petiolatum ; lamina linearis vel elliptico-linearis. Inflores- 
centia uniflora, quam folium conspicue brevior. Flos 
[ 26 ] 
