46 ORCHIDS OF THE SIKKIM-HIMALAYA. 
9. DENDROBIUM cuMULATUM, Lindl. in Gard. Chron. 1855, 756. 
Stems erect, thin at the base, thickening upwards to “5 in.; 1 to 2 feet in 
length. Leaves oblong-lanceolate, acute, length 3 to 4 іп. breadth ‘75 to 1 in. 
Flowers 1°25 in. long, in small corymbiform racemes; foral bract lanceolate, much 
shorter than the stalked ovary. Scepa/s—the dorsal elliptic, sub-acute; the lateral 
pair similar. Petals obovate, larger than the dorsal sepal. Jip as long as the petals, 
obovate-spathulate, with a broad erose emarginate apex, the base contracted into a 
long narrow claw, geniculate near its insertion to the pouched apex of the mentum, 
and with a horizontal retrose tooth at the bend. Column very short, broad; its foot 
much produced, narrow, tapering downwards, grooved in the middle and expanded at 
the lower extremity. Anther set at a right angle to the axis of the column, its lip 
acute. Bot. Mag. t. 5703; Reichb. fil. in Gard. Chron. 1868, 6; Veitch Man. Dendrob. 
34; Hook. fil. Fl. Br. Ind. V, 731. 
Sikkim; in tropical valleys at elevations up to 3,000 feet; in flower in June 
and July; Pantling No. 270. Bhotan, Lister. Assam.  Khasia Hills; Rita. Also in 
Upper Burmah. 
The flowers of this pretty species are pale purple, the lip being white with 
sometimes a pink patch near the apex and yellowish at the base; the mentum 
and apex of column are pale purple. A specimen was collected in Sikkim with the 
flowers pure white, the apex of the spur being pale green. 
Prare 63.— Dendrobium cumulotum, Lindl. A plant, of natural size, Fig. 1 floral bract, stalked 
ovary, column and lip, seen from the side, 2 longitudinal section of the base of the lip and of the 
column, showing the junction of the two and the horizontal tooth on the former, 3 the lower 
half of the lip, showing the horizontal tooth at its flexure, 4 column and its foot, showing the 
curved sac at the base of the latter, 5 anther seen from behind, 6 pollinia; all enlarged. 
10. DENDROBIUM LONGICORNU, Lindl. in Wall. Cat. 1997. 
Stems 6 to 12 in. long, tufted, slender (about :2 in. thick), erect, covered with 
short coarse black hairs. Leaves scattered, linear-lanceolate, slightly hairy; the apices 
acute, oblique, not notched; length 1:25 to 2 in., breadth -25 to :35 in. Flowers 
lateral and terminal, 1:75 to 2 in. long, solitary or in 2- or 3-flowered racemes; floral 
bract lanceolate, hairy, concave, much shorter than the slender pedicelled ovary. Sepals 
ovate-lanceolate, acuminate, keeled (in the living plant). Petals lanceolate to ovate- 
lanceolate, acute or acuminate. Zip (when spread out) broadly triangular, 3-lobed, with 
a broad ridge running along its centre from the base to the apex, dividing near the 
apex into 3 or 4 short branches; side lobes rounded, boldly nerved, and with broad 
erose apices; the terminal lobe small, sub-orbicular, fimbriate, Column short, the 
foot broad at its base, contracted towards the apex into a funnel-shaped spur nearly 
as long as the stalked ovary. Lip of anther truncate, fringed; the inner pollinia 
very narrow. Lind. Gen. and Spec. Orchid., 80; Bot. Reg. t. 1315; vol. for 1844, 
Mise. 83; in Journ. Linn. Soc. III, 16; Walp. ‘hint VI, 292; Veitch Man. Dendrob. 56; 
Hook. fl. FE Br, Ind. Y, 0. D. Жей Griff. Na HL 317. 
Sikkim; common at elevations of from 4,000 to 8,000 feet; Pantling No. 15; 
flowering iun September to November; eastward ә Ше Himalaya to Nepal, 
Khasia and Naga Hills. . 
