130 ORCHIDS OF THE SIKKIM-HIMALAYA. 
and the Indian one here described. The genus was maintained by the late Mr. Bentham (Gen. Plantar. 
III, 318), but was reduced by Sir J. D. Hooker in his Flora of British India to Eria, where it was 
placed in the section Dendrodirion. The latter author, in describing the Indian species as an ria in 
the Annals of the Calcutta Garden (V, 22), suggested the probability of its having to be removed from 
that genus; and, in his Flora of British India V, 785, he stated that, should an examination of living 
flowers prove the lip to be mobile, Ty/ostylis ought to be reinstated as a genus. Having satisfied 
ourselves that the lip is mobile, we accordingly adopt for the plant the name suggested for it by 
him (Ann. Bot. Gard. Cale. V, 22). 
TYLOSTYLIS DISCOLOR, Hook. fil in Ann. Bot. Gard. Cale. V, 22. 
Rhizome thick, woody, bearing short distant tubular sheaths. Stem thick, furrowed, 
constricted and leaf-bearing at the nodes, 3 to 10 in. long and 1 to 1°25 in. in diam. 
near the base. Leaves five or six, coriaceous, mány-nerved, narrowly oblong, blunt or sub- 
acute and emarginate, not contracted at the base, 4 to 6 in. long and "9 to 1:2 in. 
broad. Racemes from beneath the leaves and shorter than them, erect, few-flowered, 
with a stout tomentose rachis, the peduncle longer than the raceme and with distant 
broad sheathing sub-glabrous bracts. Flowers few, *4 in. long; floral bract thick, broadly 
elliptic, glabrous, much shorter than the pubescent stalked ovary. Sepals shortly pubescent 
on the outer and slightly so in the inner surface, thick, sub-equal, spreading, oblong- 
elliptic, obtuse. Petals narrowly obovate, obtuse, smaller than the sepals, sub-glabrous, 
spreading. Lip mobile, broadly cordate, articulated to the foot of the column by a claw, 
not lobed, the dise near its base with a square shining patch on the foot above the claw, 
the rest of the upper surface pubescent, the edges upturned. Mentum none. Column 
long, much curved downwards and forwards, the foot very short and with a large dark- 
coloured callus. Anther depressed. Pollinia attached to four elongated membranes. Eria 
discolor, Lindl, in Journ. Linn. Soc. IIL 51; Hook. fil. Fl. Br. Ind. VI, 190; in Ann. 
Roy. Bot. Gard. Cale. V, 22, t. 32. Р. pulehélla, (іп рагі) Hook. fil Fl. Br. Ind. 
V, 802. 
Bikkim, at elevations of from 500 to 3,500 feet; Pantling, No. 197; in flower 
during February, Khasia Hills; Simons. 
The colour of the inner surfaces of the sepals, petals and of the column is ochraceous- 
yellow, their outer surfaces being dull white. The foot of the column is of a dark leaden 
colour and the lip has а dark purplish-brown patch near its base. 
Prate 180.— Tylostylis discolor, Hook. fil. A plant; of natural size, Fig. 1 a flower, front view 
2 lip, З bract, stalked ovary, column with its foot, anther in situ and lip, seen from the side 
4 column with pollinia and stigma, front view, 5 empty anther, showing the septa, 6 and 7 pollinia;, 
all enlarged. 
21. Coelogyne, Lindl. 
Epiphytes; pseudo-bulbs coespitose or attached to a rhizome, 2- (or rarely 1-) leaved. 
Leaves coriaceous, or membranous and plicate. Inflorescence racemose, from the apex or 
base of the adult pseudo-bulb. Flowers without mentum or spur; floral bract large, 
deciduous. Sepals sub-equal, spreading, more or less lanceolate or oblong. Petals narrower, 
sometimes linear, Lip sessile on the base of the column, or very shortly clawed (in 
C. uniflora), sometimes saccate at the base, oblong and 3-lobed or sub-orbicular and 
without lateral lobes. Column long, erect, straight or curved, winged and often hooded 
