34 DENDROBIUM. 



sepals triangular-ovate, acuminate, keeled at the back, pale green 



-with deeper longitudinal veins ; petals linear, acute, coloured like the 



sepals ; lip three-lobed, the lateral lobes oblong, erect, crimson-scarlet ; 



intermediate lobe ovate, apiculate, pale green bordered with red, and 



with a large tumid warty red crest, below which are five raised 



red lines, of which the outside two are the most developed. 



Column tridentate at the apex, green with crimson margins. 



Dendrobium omentum, Rchb. in Gard. Chron. XXI. (1884), p. 604. Williams' 

 Orch. Alb. IV. t. 174. 



Introduced by Sander and Co., in 1884, from the "west coast of 

 the Malayan peninsula."* The specific name, cruentum, "blood- 

 red," refers to the colour of the lip. As a species it is distinct, 

 and the colour of its flowers remarkable. 



D. crystallinum. 



Eudbndrobium — Fasciculata. Stems tufted, sub-pendulous, 12 — 18 or 

 more inches long. Leaves linear-lanceolate, acute, 4 — 6 inches long, 

 deciduous. Flowers about 2 inches across, solitary or in twos and 

 threes, on slender peduncles sheathed by membraneous bracts to 

 nearly half their length; sepals linear-oblong, undulate, white, some- 

 times with a pale amethyst-purple blotch near the apex, but which 

 is always present on the petals ; petals much broader, obovate-oblong ; 

 lip sub-orbicular with a convolute claw, deep ochreous yellow bordered 

 with white, and generally with an amethyst-purple stain at the 

 anterior margin. 



Dendrobium crystallinum, Rchb. in Gaid. Chron. 1868, p. 572. Id. Xen. Orch. 

 II. p. 210, t. 193. Bot. Mag. t. 6319. 



A native of the Arracan Mountains, near Tongu, in British Burmah, 

 where it was discovered by Colonel Benson, in 1867, "growing upon 

 small trees in exposed places," often in company with Dendrobium 

 Bensonice, and introduced by us through him. It flowered for the 

 first time in Europe in our Chelsea Nursery, in the spring of the 

 following year. As a species, it is chiefly distinguished from all 

 its congeners of the Eudendrobium section by its elongated anther 

 case, covered with numerous crystalline papillce, which suggested 

 the specific name. 



D. cumulatum. 



Eudbndrobium — Pycnostachyce. Stems tufted, slender, pendulous, 18—24 

 inches long. Leaves oblong, acuminate, 3 — 4 inches long. Flowers 1 

 inch in diameter, rosy purple suffused with white, collected into sub- 

 globose corymbs, the rachis of which, as well as the pedicels, are deep 



* The west coast of the Malay peninsula extends for upwards of a thousand miles from 

 Martaban to Singapore; the habitat of this Dendrobe is thence virtually withheld. 



