being somewhat flattened; O. Avamerianum is readily 
distinguished from both by its nodose inflorescence. 
O. Sanderae is, however, readily distinguished from 
OQ. Papilio by the much crisped lateral petals and lip, by 
the lighter coloration of the flowers, and by the numerous 
elandular appendages on the wings of the column, There 
is every indication that under cultivation O. Sanderae will 
thrive under the conditions as to heat, light and moisture 
that are suitable for its two near allies. 
Description.—Ilerb 3 epiphytic. Pseudobulbs  ovate- 
oblong, slightly compressed, 1$-24 in. long, 14-1) in. wide, 
monophyllous. Leaves subsessile, coriaceous, oblong, some- 
what obtuse, marbled with brown, 1-13 ft. long, 2-3 in. 
wide. Scapes suberect or arcuate, about 24 ft. long, some- 
what flattened towards the apex, few-flowered ; bracts 
oblong-lanceolate, acuminate, 2 in. long; pedicels 13-2 in. 
long. Flowers showy, opening one at a time. Sepals: 
upper linear-lanceolate or somewhat spathulate, acute, 
reddish-brown, about 3 in. long; lateral oblong, acute, 
crisped and wavy, yellow, spotted with brown, 24-23 in. 
long, 13 in. wide. Petals linear-lanceolate or somewhat 
spathulate, acute, reddish-brown, about 23 in. long. Lip 
3-lobed ; lateral lobes rounded, crisped and wavy, yellow, 
spotted with brown, 5 lin. wide ; mid-lobe clawed, orbicular, 
erisped and wavy, about 1} in. long and broad; crest 
5-lobed, smeoth. Column 5 lin. long, wings broad, dis- 
tinctly glandular pectinate. 
Fig. 1, column and base of lip; 2, anther-c 
; | ap; 3, pollinarium,; 4, sketch of 
an entire plant:—1-3 enlaryed, 4 much reduced. °° oe 
