inclusive of the terminal buds. Floral bracts ovate-lan- 
ceolate, very long-acuminate, concave, many-nerved, 
the lowest one about 1.8 cm. long. Flowers large and 
showy, rather membranaceous. Dorsal sepal elliptic-ob- 
lanceolate, acute, about 4 cm. long and 1.4 cm. wide, 
7-nerved with numerous reticulations. Lateral sepals ob- 
long-elliptic, acute, about 4.1 cm. long and 1.5 cm. 
wide, 8- to 9-nerved. Petals obovate-oblong, falcate, 
nearly 4 cm. long, about 1.5 cm. wide, very shortly 
acute or subacute, 6- to 8-nerved in the middle with nu- 
merous reticulations. Lip deeply 3-lobed near the middle 
with the mid-lobe deeply bilobed, about 4.2 em. long to 
the tip of a terminal lobule, about 3.1 cm. wide across 
the widest part of the lateral lobes, very shortly clawed 
and abruptly rounded to subeordate at the base; lateral 
lobes semiobcordate, broadly rounded at the apex, about 
1.8 em. wide where broadest; mid-lobe nearly sessile, 
obcordate, minutely but broadly apiculate in the deep 
median sinus, about 2 cm. long to the tip of a lobule 
and 2 cm. wide near the apex, with the margins irregu- 
larly crenulate and undulate-plicate. There are five ap- 
proximate median keels which are scarcely more than 
thickened nerves through the basal third of the lip, are 
abruptly dilated into high thin semielliptical plates near 
the middle of the lip, and then decrease into low keels 
of which the outer pair are relatively lower and extend 
about to the center of the mid-lobe; the inner pair which 
are higher than the outer pair are gradually dilated to an 
abruptly truncate apex near the anterior third of the mid- 
lobe; the central keel, which is lower but stouter than 
the ones beside it, is slightly dilated at its apex where it 
terminates close to the median sinus of the mid-lobe. 
Column strongly arcuate, gradually dilated above, about 
3 cm. long, winged on each side with the wing some- 
[ 63 ] 
