ZERIDES. 211 
sometimes absent; the mid-lobe larger than the side lobes, or smaller and incurved. 
Column short, its foot short or long; rostellum short or long and bifid. Anther 2-celled, 
with or without a beak; pollinia two, globose, sulcate; caudicle long or short; gland 
various, Species about 50; Eastern Asiatic. | 
КИТИК а $ 410b nla БЕ Е oae 5. ios UE MROICOPMM. 
Leaves flat, keeled— 
Apical lobe of lip small narrowly oblong . . . . . . . 2. Ж odoratum. 
Apical lobe of lip large and hastate, acute. . . . . . . 2. Æ. multiflorum. 
1. ZEmrpES Loncicornu, Hook. fil. Ic. Plant. 2127. 
Stem slender, elongate, pendulous. Leaves terete, 4:5 to 7 in. long and about ‘1 
in. thick, Peduncle extra-axillary, very slender, 1- to 2-flowered, 1:25 to 2 in, long. 
Flowers 1:95 in. long. Sepals oblong; the dorsal erect, apiculate; the lateral pair 
spreading, sub-faleate, flexuose. Petals as large as the dorsal sepal, oblong, tapering 
somewhat towards the blunt apex, the edges much undulate. ip adnate to the long 
foot of the column, consisting chiefly of an elongated narrowly infundibuliform spur 
curving slightly forwards, its mouth with two unequal hooked linear acute lateral lobes 
on each side; the apical lobe oblong, decurved, slightly dilated and cuneiform at the 
apex. Column short, the foot much longer. Anther shortly beaked; pollinia globose ; 
caudicle filiform, dilated аб the apex; the gland small, oblong. Capsule narrowly 
cylindric, ridged, 1°75 in. long. Hook. fil. Fl. Вг. Ind. VI, 44. Mesociastes uniflora, 
Lindl. in Wall. Cat. 1993; Gen. and Spec. Orch 45. Luisia uniflora, Blume Rumph. IV, 
50; Mus. Bot. Lugd. Bat. I, 64; Lindl. Fol. Orch. 3. 
At Dumsong, in Bhotan, elevation 5,500 feet; Pantling No. 350; in flower during 
September. Nepal; Wallich. Upper Assam, in the Naga Hills, at an elevation of 5,500 
feet; Clarke. - 
The flowers are white with a flush of pink on the spur; they are inodorous, 
The species appears to be to a great extent self-fertile. Mr. Pantling, who kept 
living plants of it under observation, recorded the following note on this point:— 
“The contraction after removal of the dilated portion of the caudicle immediately below the pollen 
masses, and the backward movement of the masses to a right angle, suggest that these phenomena are 
arrangements for securing self-fertilization. Moreover, the main portion of the caudide is so very 
slender and the pollinia and anther are so delicately attached to the column that the whole becomes 
easily influenced either by the force of the wind, or by the jar caused by the leaves striking against the 
flowers. On dislocation taking place, the masses hang as by a thread in front of the stigmatic cavity, 
and in that position very little is needed to bring them in contact with the viscid surface of the 
stigma, and so to effect self-fertilization. Of seven flowers which opened near my house, all were thus 
self-fertilized.” 
ns of this from the Khasia Hills, as figured by Sir J. W. Hooker in his 
Specime 5 : . 
Pes 45 lantarum, have the apical lobe of the lip more dilated and slightly bifid than 
those from Sikkim as figured here. 
Рілте 281.—Zrides longicornu, Hook. fil. A plant, of natural size, Fig. 1 а flower, 2 section of 2 : 
n and its foot and of the lip, 3 column and foot with anther tn situ, front view, 4 apex of column | 
езе the pollinia in situ, the cap of the anther having been removed, 5 pollinia shortly die хен. - 
is bending of the caudicle having been completed, 6 empty anther seen from below; all enlarged. l, i 
Axx. Roy. Bor. GARD., CALCUTTA, Vor. VIII. 
