of G. atropurpurea, Hook., a Guiana species figured at 
t. 3220 of this work, which has uniformly purple flowers, — 
and shows certain marked structural differences in the — 
lip. At Kew G. grossa has thriven well, and has flowered — 
in a teak basket suspended from the roof of the tropical — 
orchid-house. The long elegant racemes are most attrac- — 
tive, and the plant is striking on account of the large — 
size of its leaves and pseudobulbs. : 
Description.—Herb; epiphytic; pseudobulbs clustered, 
ovoid, acutely 8-angled, 2-23 in. long, their bases clothed 
with ovate, membranous sheaths, with 2 apical leaves. 
Leaves elliptic or obovate-elliptic, shortly acuminate, 
plicate, 8-12 in. long, 24-34 in. wide. Scapes curved and 
pendent, 14-2 ft. long, clothed at the base with a few 
lanceolate sheaths; racemes open, many-flowered. Sepals: 
posterior oblong-lanceolate, acute, adnate to the base of — 
the column, recurved at the tip and with revolute margins, 
about 1 in. long; lateral reflexed, oblong-lanceolate, — 
acute, 2 in. long, margins revolute. Petals falcately | 
incurved, adnate to the edges of the column, about 4 in. 
long, aristate-acuminate at the tip and recurved. Lip — 
clawed; limb narrow, fleshy, compressed, 5-lobed ; inter- 
mediate lobe triangular, shortly acuminate, conduplicate- 
concave, } in. long; lateral lobes long subulate-aristate, 
1 in. long; lower lobes falcate-incurved, linear-oblong, 
blunt, 4 in. long; disk bluntly 3-callose on the face. 
Column incurved, } in. long, base narrowed, tip clavate, 
wings faleate-subulate. Pollinia 2, clavate-oblong ; stipe 
linear; gland small. 
F Fig. 1, column and lip; 2, column, front view; 8, anther-cap; 4, pollinarium; 
, Sketch of an entire plant :—all enlarged except 5, which is much reduced. 
