flexed, light green and white, entirely glabrous, with 
widely spreading segments. Sepals subfleshy, lip fleshy. 
Dorsal sepal strongly fornicate and concave, when ex- 
panded lanceolate-oblong, acute, about 8 mm. long, up 
to 8 mm. wide. Lateral sepals connate into an oblong- 
elliptic deeply concave lamina which is sharply bidentate 
to above the middle with lobules recurved at the apex, 
about 7.5 mm. long and 4 mm. wide when expanded. 
Petals linear, faleate-incurved, acute, up to 7.5 mm. long 
and 1.1 mm. wide. Lip adnate to the column at the base, 
rhombic or ovate-rhombice with rounded spreading sides, 
more or less abruptly long-acuminate, cuneate below 
(often slightly incurved on each side) to a sessile base, 
about 6 mm. long, up to 4.1 mm. wide; disc with a low 
callose keel extending from the base to about the middle. 
Column cylindric, slightly tapering above, about 4.8 
mm. long at the back, somewhat sigmoid-recurved near 
the apex. 
The allied Notylia Lehmanniana Krinzl. from Colom- 
bia differs from this species in having racemes floriferous 
to the base and flowers less than half as large. 
Florally N. rhombilabia is very similar to the Panaman- 
ian N. latilabia A. & S., but it is very dissimilar in veg- 
etative parts. 
Loreto: vicinity of Iquitos, at 100 meters altitude, epiphyte in 
dense forest, November to December 1936, G. Klug 10028 (Tyre in 
Herb. Ames No. 62159). 
[ 207 ] 
