ORCHIDACEAE QUAEDAM AMERICANAE 
wide, oblong, rounded at the tip, thickened along the middle 
nerve. Disc bicallose near the summit of the column, calli 
rounded, smooth. Column 10-11 mm. long, adnate to the 
labellum. 
Closely allied to Epidendrum scabrum Ruiz & Pav., 
from which it is in part distinguished by larger flowers and 
longer column. Jamieson No. 10 (referred to E. scabrum by 
Lindley) has similar flowers, but the plants are of a more 
branching habit with longer leaves. From Epidendrum 
chioneum Lindl., it is readily distinguished by the linear- 
spatulate petals. 
Colombia, State of Cauca, Headwaters of Rio Lopez, 
Rio Palo basin, Tierra Adentro, H. Pittier 1067, January 
1906. 2500-3000 meters altitude. (Type in U. S. Nat. 
Herb. No. 531269.) 
Epidendrum pruinosum A. Rich. & Gal. in Ann. Sci. 
Nat. ser. 3, 3 (1845) 20, Ames ampl. Pseudobulbs 1.5 cm. 
long, globose, unifoliate, subtended by several elongated 
acute sheathing bracts. Leaf oblong-lanceolate, tapering 
toward both ends, acute, 6-9 cm. long, 1-1.8 cm. wide, 
coriaceous. Peduncle including the raceme about 14 cm. 
long, with several squamiform scarious bracts. Raceme 
laxly 5-7-flowered. Floral bracts about 2 mm. long, deltoid- 
lanceolate, acuminate, acute. Pedicel smooth, with the 
ovary about 1.8 cm. long, slender. Flowers about 8 mm. 
long. Lateral sepals broadly spatulate, rather fleshy, 8 mm. 
long, 2.5 mm. wide above the middle, rounded at the tip. 
Dorsal sepal 8 mm. long, 2 mm. wide near the apex, tapering 
gradually to a broad base, obtuse. Petals 7 mm. long, 1.5 
mm. wide near the tip, spatulate, obtuse. Labellum adnate 
to the lower half of the column, 7.5 mm. long, distinctly 
3-lobed; lateral lobes 4 mm. long, 2.5 mm. wide, obovate, 
obtuse, divaricate, membranaceous; middle lobe about 3.5 
mm. long, 6 mm. wide, retuse, transversely oblong, beneath 
the summit of the column on the disc of the lip there is a 
cushion-like callus which terminates in three raised tuber- 
culate nerves which extend on the middle lobe. Column 
stout, 5 mm. long, ebrachiate. 
19 
