43. Clavatum, Wall

Pseudobulbs up to 3 ft. long, cylindric, pendulous: racemes 4-6-flowered; flowers 2-3 in. across; sepals and petals orange-yellow, the former oval-oblong, about half as wide as the nearly orbicular petals; lip bright yellow, with a maroon blotch in center, the front lobe orbicular, denticulate, the upper surface pubescent. tropical Himalayas to S. China. B.M. 6993.

44. Gibsonii, Lindl

(D. fuscatum, Lindl.). Pseudobulbs up to 3 ft. tall, a little enlarged in the middle, slender: racemes 5-10-flowered, pendulous; flowers about 2 in. across, golden yellow, with 2 maroon spots on the lip; sepals and petals oval-oblong, obtuse, about the same width; lip with the limb a little broader than long, rounded at apex, fimbriate, villous on the upper surface. tropical Himalayas to S. China and Java. P.M. 5:169. B.M. 6226.

Section V

A. Sepals and petals white. B. Without markings.

c. Middle lobe of lip quadrate, emar-ginate, undulate; spur short, saccate .........................45. lasioglossum cc. Middle lobe of lip triangular, acute, ciliate; spur long, conic.........46. aqueum bb. With purple or mauve at apex........32. nobile aa. Sepals and petals purple, mauve or lilac. B. Base of lip inclosing column; sepals and petals widely spreading.

c. Lip fringed; disk yellow..........47. Loddigesii cc. Lip denticulate; throat deep purple 48. superbum bb. Base of lip not inclosing column; sepals and petals ascending........49. MacCarthiae

AAA. Sepals and petals yellow. b. Color pale.

c. Flowers buff-yellow; lip clawed, with 2 purple spots..................50. albo-sanCC Flowers primrose-yellow; lip at base [guineum convolute around column. D. Middle lobe of lip oblong, emarginate; petals larger than sepals 51. luteolum dd. Middle lobe of lip nearly orbicular, reflexed, much undulated.. 52. ramosum BB. Color bright.

C Lip with a single large maroon blotch........................53. ochreatum cc. Lip with 2 purple spots.

d.'Margin of lip denticulate.......54. chrysanthum dd. Margin of lip fimbriate, the divisions long and bearded .... 55. Hookerianum

45. Lasioglossum, Reichb. F

Pseudobulbs up to 1 1/2, ft. long, slender, pendulous, a little enlarged at the middle: flowers in 2's or 3's, white, except the reddish lines on the side lobes of the lip; sepals ovate, a little narrower than the petals; lip 3-lobed, the lateral lobes rounded, denticulate, the middle lobe nearly quadrate, undulate, reflexed, the disk with a tuft of orange-yellow hairs. Burma. B.M. 5825.

46. Aqueum, Lindl

(D. album, Wight.). Pseudo-bulbs up to 2 ft. long, rather stout, decumbent: flowers about 2 in. across, solitary or in pairs, cream-white, except a yellow spot on the lip; sepals and petals similar, broadly ovate, acute; lip obscurely 3-lobed, the middle lobe triangular, deflexed, ciliate, the upper surface pubescent. Neilgherry Hills. B.R. 29:54. B.M. 4640. J.F. 3:262.

47. Loddigesii, Rolfe

(D. pulchellum, Lodd., not Roxbg. D. Seidelianum, Reichb. f.). Dwarf.: pseudo-bulbs 3-4 in. long: flowers solitary, about 1 1/2 in. across; sepals and petals lilac, the sepals oblong, much narrower than the ovate petals; lip orbicular fringed, the center orange-yellow, the margin pale lilac. China. L.B.C. 20:1935. B.M. 5037.

48. Superbum, Reichb. F

(D. macrophyllum, Lindl. Plate XXXV. D. Scortechinii, Hook. D. macranthum, Hook.). Pseudobulbs up to 3 or 4 ft. long, cylindric, pendulous: flowers in pairs, 3-5 in. across, with the odor of rhubarb; sepals and petals purple-lilac, acute, the former oblong-lanceolate, about half as wide as the oblong-ovate petals; lip with the tube a deep red-purple, this color appearing as 2 large spots in the throat, the front lobe acuminate, reflexed, denticulate, the upper surface pubescent. Philippines. B.M. 3970. CO. 20. P.M. 8:97. F.S. 8:757. O.R. 14:78; 20:144. variety anosmum, Reichb. f. (D. anosmum, Lindl. D. macrophyllum Dayanum, Hort.). Pseudobulbs shorter: flowers usually solitary, nearly odorless, smaller, the sepals and petals shorter and broader. Lind. 6:264. P.M. 15:97. variety giganteum, Reichb. f. Flowers larger. variety Huttonii, Reichb. f. Flowers white, except the base of the lip and 2 spots on it which are purple. Malay Archipelago. variety Richardii, Hort. Medium-sized very fleshy flowers set on long bristled pedicels.

Plate XXXV. Dendrobium superbum as grown in the American tropics.

49. Maccarthiae, Thwaites

Pseudobulbs up to 2 ft. long: flowers in 2-3-flowered pendulous racemes; sepals and petals ascending, the flower not opening wide, pale rosy mauve, acute, the former lanceolate, narrower than the oblong-ovate petals which are sometimes purple-striped; lip pale purple, striped with deep purple and with a maroon spot surrounded by a white zone. Ceylon. B.M. 4886. G.W. 14, p. 408.

50. Albo-Sanguineum, Lindl

Pseudobulbs up to 15 in. long, stout, cylindric, erect: racemes 2-7-flowered; flowers 2-3 in. across, buff-yellow, with 2 purple spots on lip; sepals oblong-lanceolate, acute, about half as broad as the oblong-oval petals which sometimes have a few red streaks at the base; lip broadly clawed, the blade broadly obovate or nearly orbicular, undulate. Moulmein and Tenasserim. B.M. 5130. F.S. 7:721. J.F. 2:203.

51. Luteolum, Batem

Pseudobulbs up to 1 1/2 ft. tall, furrowed, cylindric: flowers 2-4, in lateral racemes, 2-2 1/2 in. across, primrose-yellow; sepals oblong-elliptic, narrower than the oval petals; lip with a few reddish streaks, slightly 3-lobed, the middle lobe oblong, emar-ginate, a tuft of yellow hairs below the tomentose disk. Moulmein. B.M. 5441. F.S. 23:2395 (as D. Lowii). J.H. III. 32:143; 51:519; 54:137. V.O. 57. variety chlorocentrum, Reichb. Flowers a little larger with greenish hairs on the lip. G.C. II. 19:340.