DENDROBIUM. 47 
À species varying somewhat as to the size of its flowers and as to the form of 
the middle lobe of the lip. A very hirsute form with larger leaves than above described, 
and with broader sepals and petals, and lip setosely fringed on the central ridge and on 
the nerves, was described as a distinct species by Griffith (whom Reichenbach filius 
followed) under the name of D. hirsutum (Griff. Notul. III, 318; Ic. Pl. As. t. 305; 
Reichb. fil. in Gard. Chron. 1884, II, 488) But Lindley reduced this species to a 
variety (hirsuta) of this, a course followed by Sir Joseph Hooker (Fl. Br. Ind. l. е.). 
This species occasionally flowers two years in succession from the same pseudo-bulb. 
The colour of the sepals and petals is pure white; the lip on the upper surface is pale 
brown, veined with pale orange and having a central line of that colour. 
Prate 64.—Dendrobium longicornu, Lindl. A plant, of natural size. Fig. 1 floral bract, stalked 
ovary, column, spur-shaped mentum and lip, seen from the side, 2 petals, 3 lip, spread out, 4 column 
and funnel-shaped mentum (spur) 5 anther, 6 pollinia. Nos, 1 and 2 of natural size, Nos. 8 to 6 
enlarged. 
11. DENDROBIUM ғовмовом, Roxb. іп Wall. Cat. 1998; Fl. Ind. III, 485, 
Stems terete, 9 to 18 in. long and “5 or “6 in. thick, erect, the sheaths pubescent. 
Leaves oblong, the apex obliquely sub-acute and notched; length 3 to 5 in., breadth 1 
to 195 in. Flowers large, white, in short terminal or lateral racemes of three to 
five, from 3 to 5 in. across; floral bract short, ovate, sheathing. Sepals oblong- 
lanceolate, acute, spreading, keeled. Petals much larger than the sepals, sub-orbicular, 
cuspidate, the edges undulate. Тір obcuneate or broadly-obovate; the side lobes small 
and indistinct; the terminal lobe dilated, its apex very broad, slightly emarginate, 
minutely mucronate, its edges undulate but not fimbriate; disc with two  tubercled 
yellow central ridges. Column rather broad, its edges not winged, its foot short 
and contracted at the apex into а small sac; the mentum half as long as the 
dorsal sepal, conical. Anther quadrate; pollinia narrowly oblong. Lindl. Gen. and 
Spec. Orchid, 81; in Wall РІ. As. Rar. I, 34, t. 39; in Bot. Regist, 1838, 
Misc. No. 86; 1839, t. 64; in Journ. Linn. Soc. ІП, 16; Рах. Mag. Bot. VI, 
p. 49, with fg.; Fl. des Serres, t. 226 and XVI, t. 1633-4; Williams’ Orchid Alb. 
VII, t. 308; Veitch Man. Dendrob. 44, with jfig.; Hook. fil Fl. Br. Ind. V, 721. 
D. Infundibulum, Reichb, fil. (not of Lindl.) in Regel Garten Flora, XXXVI, t. 1253. 
At the base of the Sikkim-Himalaya, common; Pantling No. 271; flowering ` 
during May. Distributed westward to Nepal and eastward to the base of the Khasia, 
Assam and Burmese ranges; Andaman Islands. | 
The lip in the Sikkim plant is yellow and the rest of the flower pure white; 
the column is yellowish in its lower half. This is a variable species as regards the 
size of its flowers, and to a slight extent also as to the coloration of the lip. In 
his “Flora of British India” Sir Joseph Hooker admits three varieties. The plant here 
figured appears, as far as we have been able to observe, to be constant in the 
characters above recorded, 
PLATE 65.— Dendrobium formosum, Roxb. Stem in flower, with young one а{ its base, of 
natural size. Fig. 1 column with anther in situ, and foot, front view, 2 vertical section of the preced- 
ing, seen from the side, 3 pollinia; all enlarged. 4 dehisced capsule; of natural size. 
