This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
Pseudobulbs up to 1 ft. long, slender-clavate: flowers solitary or in pairs, fragrant, white except for a few purple spots on the lip; sepals narrower than petals, both acute; Up acuminate, reflexed at apex. S. Japan. B.M. 5482.
Pseudobulbs up to 1 1/2 ft-long, slender: flowers solitary, or sometimes in 2's or 3's, about 2 in. across; sepals and petals white, amethyst-tipped; lip with the front lobe ovate, amethyst margined with white. Nepal. B.M. 6199. G.C. II. 16:625.
Pseudobulbs up to 2 ft. long, somewhat pendulous: flowers solitary, or sometimes in 2's or 3's, about 2 in. across; sepals and petals white, tipped with amethyst, or this sometimes lacking in the sepals which are much narrower than the petals; lip with a yellow middle lobe margined white. Burma. B.M. 6319. variety albens, Hort. Sepals and petals pure white; lip rich yellow tipped with white.
Pseudobulbs up to 20 in. long, slender: flowers in pairs or 3's, about 1 1/2 in. across, white, the sepals, petals and lip tipped pale mauve; sepals lanceolate; petals oblong-elliptic; lip recurved at the obtuse apex, the disk with a large purple spot. India. B.M. 4663. J.F. 1:68. CO. 27.
(D. cucullatum, R. Br.). Pseudobulbs up to 3 ft. long, slender, pendulous: flowers commonly in pairs, up to 2 in. across; sepals and petals pale rosy mauve, acute, the sepals lanceolate, much narrower than the elliptic-oblong petals; lip obscurely 3-lobed, pale primrose-yellow, pubescent on the upper surface, purple-streaked at base. India. B.R. 548 (as D. cucullatum); 1756. Gn. 55, p. 405. F.S. 9:955. L.B.C.8:750. C0.pl.26. B.M. 2242 (asD.cucullatum); 2584. variety latifolium, Hort. Leaves broader.
Pseudobulbs up to 15 in. long, curved, rather stout: flowers solitary, or in 2's or 3's, amethyst-purple with 2 maroon spots on each side of the throat of lip; sepals oblong-lanceolate, narrower than the oval-oblong petals; Dp downy, apiculate. Moulmein. B.M. 5488.
Pseudobulbs up to 20 in. long, erect or nearly so, rather stout: flowers solitary or in pairs, 2-3 in. across; sepals and petals pale mauve-lilac, oblong, obtuse; lip pale primrose-yellow, purple-streaked at base, the middle lobe very broad. Nepal and Sikkim. Gt. 1861:326. J.H.III.50:377. B.M.5003 (as D. nobile, variety). variety giganteum, Hort. Pseudobulbs pendulous, more slender: flowers larger, the lip sometimes veined with pale rose.
Pseudobulbs up to 1 1/2 ft. long, nearly erect, rather stout, longitudinally marked with white lines: flowers in 2's or 3's, about 1 1/2 in. across; sepals and petals white, tinted lilac, obtuse, the sepals oblong, narrower than the petals; lip white tinted lilac, sometimes downy, the front lobe obtuse or retuse, the middle orange-yellow. Assam. B.M. 4993, 5011. CO. 40. variety roseum, Hort. Flowers darker. variety album, Hort. Flowers white.
(D. Dartoisianum, De Wild. D. signatum, Reichb. f.). Pseudobulbs up to 32 in. long, erect, rather slender: flowers solitary, or in 2's or 3's, 2-2 -2 1/2 in. across, white, the disk of the lip yellow with 2 maroon spots; sepals oblong, obtuse, much narrower than the petals; lip with the front lobe orbicular, denticulate, downy on the upper surface. British Burma. B.M. 5679, 8352. O.R. 11:241; 16:68. F.M. 355. variety majus, Hort. Flowers larger.
Pseudobulbs up to 15 in long, rather stout, curved, pendulous: flowers solitary, about 1 1/2 in. across, cream-white, with a large light yellow spot on lip streaked with orange-red; sepals and petals lanceolate, obtuse; lip with the front lobe orbicular-ovate, obtuse, downy. Khasia Hills. B.R. 33:62. B.M. 4686. F.S. 8:818. J.F. 4:344.
(D. Boxallii, Reichb. f. D. Bullerianum, Batem.). Pseudobulbs up to 1 1/2 ft. long, somewhat thickened from a slender base: flowers in 2's and 3's, 2-2 1/2in. across, white, the sepals, petals and lip tipped with rose-purple; sepals oblong-lanceolate, narrower than the ovate-lanceolate petals; lip with the front lobe broadly ovate, acute, a large yellow orange-streaked blotch in the center. Burma and Moulmein. B.M. 5652. F.M. 315. G.W. 1, p. 227.