obliquely oblong in outline, about 3.5 mm. long, ob- 
liquely bilobulate at the abruptly truncate apex; lower 
portion (about one third) unguiculate-narrowed ; upper 
portion oblong-subquadrate with a short decurved tooth 
(having an intramarginal keel) at the base on the anterior 
margin. Lip simple, oblong to oblanceolate-oblong, 
broadly obtuse at the apex, cordate at the base, some- 
what thickened above, 3-nerved with the mid-nerve cla- 
vate at the tip, about 3.8 mm. long in greatest length 
and 1.4 mm. wide above the middle; disc with a pair of 
indistinct keels through the anterior half. Column about 
as long as the petals, lightly arcuate, terminating in a 
denticulate wing. 
This species seems to be nearly allied to the Ecuadorian 
Masdevallia filamentosa Kriinzl., but has shorter leaves, 
shorter sepaline tails and dissimilar larger petals. 
Cuzco: Prov. of Paucartambo, San Pedro to Santa Isabel, at 1350 
meters altitude, on old tree trunk, December 5, 1947, C. Vargas 
006778 (Tyre in Herb. Ames No.64894). 
EXPLANATION OF THE ILLUSTRATION 
Pirate I. Poconta Varoasi C. Schweinfurth. 1, 
plants, one fourth natural size. 2, flower from side, 
natural position, three fourths natural size. 3, lat- 
eral sepal, three fourths natural size. 4, dorsal 
sepal, three fourths natural size. 5, petal, three 
fourths natural size. 6, lip, expanded, three fourths 
natural size. 7, column with anther, three quarters 
view, natural size. 
Drawn by Dorotuy H. Marsu 
[ 28 ] 
