the case of P. grandis differs from that suitable for most 
other species of the genus. It requires warmer conditions 
and must be cultivated in an intermediate house. It 
thrives well at Kew in fibrous peat and sphagnum moss. 
It needs good drainage and the roots must be kept 
constantly moist. 
Description.—Herb, epiphytic, over 1} ft. high; stems elongated, cylindric, 
1-1} ft. long, sparingly clothed with tubular keeled sheaths 3-33 in. long. - 
Leaves sessile, subcordate ovate, somewhat obtuse, coriaceous, 7-9 in. long, 
33-7 in. wide. Spathe lanceolate-oblong, acute, conduplicate, 1} in. long; 
scapes erect 1} ft. long; racemes many-flowered; bracts ovate, subacute or 
apiculate, conduplicate-concave, over + in. long ; pedicels curved, finely warted, 
nearly } in. long. Flowers secund, spreading, unusually large for their genus, 
tinged with brown. Sepals: posterior suberect, linear-lanceolate, subobtuse, | 
over 1 in. long, somewhat concave at the base, the margin revolute ; lateral 
connate about halfway up, oblong, rather concave, 1} in. long, 3 in. wide, 
2-lobed at the tip, the lobes subobtuse. Petals parallel, oblong, blunt, 
coriaceous, over } in. long, much incurved above the middle. Lip ovate- 
oblong, blunt, $ in. long, dilated at the base, involute and finely warted at the 
sides, abruptly incurved at the tip; disk fleshy. Colwmn clavate, } in. long. 
Tas. 8853.—Fig. 1, flower with the sepals removed; 2 lip; 8, column; 
4, anther-case ; 5, pollinia ; 6, sketch of an entire plant :—all enlarged except 6, 
which is much reduced. . 
