acute to acuminate, gradually narrowed below to an in- 
distinct deeply channelled petiole (up to 7.6 cm. long), 
with several conspicuous ribs, up to about 46.3 em. long 
including the petiole and 8.9 cm. wide. Scape lateral, 
1-flowered, erect, clothed with three remote tubular 
sheaths, about 20.6 em. high. Pedicellate ovary pluri- 
suleate, recurved, shorter than the erect tubular-infun- 
dibuliform bract which is similar to the upper sheath. 
Flower nodding, very large, with spreading sepals. Sepals 
‘*bronze-tan’’ on inner surface. Dorsal sepal elliptic- 
lanceolate, subacuminate, concave below, about 8.9-10 
em. long and 2.15 em. wide. Lateral sepals similar, 
elliptic-lanceolate or oblong-lanceolate, acuminate, ob- 
lique at the base and forming a spur-like mentum with 
the column-foot, about 9-10 cm. long measured along 
the posterior margin and 2—2.2 cm. wide in the middle. 
Petals much smaller than the sepals, erect with recurved 
apex in natural position, pale creamy yellow shading to 
white at the apex, when expanded elliptic-oblong, acute, 
oblique at the base, about 4.4-4.8 cm. long and 1.6—2 
cm. wide near the middle. Lip gently recurved with the 
sides of the lower half incurved in natural position, within, 
golden yellow at the base, lighter in the middle and then 
maroon extending to the white tip; lamina when ex- 
panded oblong-elliptic, sharply but not deeply 3-lobed 
in the middle, narrowly cuneate below, about 4.6—5 cm. 
long and 1.9 cm. wide across the lateral lobes; lateral 
lobes narrowly semiobovate, with a short rounded cren- 
ulate tree apex; mid-lobe round-ovate to oblong-ovate, 
with erose-crenulate margins, broadly rounded in front, 
about 2.1—2.4 cm. long and 1.8 cm. wide, separated from 
the lateral lobes by a narrow sinus; disc with a narrow 
callose line in the middle below and with a broad oblong- 
ovate callus between the lateral lobes. Column slender, 
about 1.7-1.9 em. high at the back, finely velutinous, 
[ 158 ] 
