980 



DENDROBIUM 



DENDROBIUM 



SECTION II. 



A. Raceme 1-2-, rarely 3-fld. 

 B. Mentum of fls. very short; sepals and 



petals green, yellow-margined 3. cruentum 



BB. Mentum of fls. long, extinguisher- 

 shaped. 



c. Sepals and petals white, not keeled. 

 D. Fls. 1^-2 in. across; lateral 



lobes of lip manifest. 

 E. Middle lobe yellow, reflexed; 



lateral lobes yellowish green. 4. scabrilingue 

 EE. Middle lobe white, yellow- 

 marked, fimbriate 5. longicornu 



DD. Fls. 3 in. across; lateral lobes of 



lip indistinct 6. infundibulum 



cc. Sepals yellowish white, keeled 7. cariniferum 



AA. Raceme 8-8-fld. 



B. Fls. yellow 8. Lowii 



BB. Fls. white. 



c. Petals broad, oval or obovate 9. f ormosum 



cc. Petals oblong-lanceolate, narrow. . . 10. draconis 



3. cruentum, Reichb. Pseudobulbs erect, 10-12 in. 

 tall: fls. 1H~2 in. across; sepals triangular-ovate, 

 keeled; petals linear; lip 3-lobed, the lateral lobes 

 scarlet, the middle lobe pale green, red-margined. 

 Malay Penins. G.C. III. 18:91. 



4. scabrilingue, Lindl. Pseudobulbs erect, 8-14 in. 

 tall: fls. about 1H in- across; sepals and petals similar, 

 ovate-lanceolate, white; lip 3-lobed, the lateral lobes yel- 

 low-green, the middle lobe reflexed, yellow with orange- 

 yellow lines. Burma. B.M. 5515 (as D. hedyosmum). 



1235. Dendrobium Dearei. 

 (XM) 



5. longicornu, 'Lindl. Pseudobulbs 8-14 in. tall, 

 slender: fls. 2-3 in. across, white except a central orange 

 or yellow band on lip ; sepals and petals similar, elliptic- 

 oblong; lip fimbriate; spur slender. Burma. B.R. 1315. 



6. infundibulum, Lindl. Pseudobulbs up to 2 ft. 

 long, cylindric, slender: fls. about 3 in. across, white 

 except the yellow blotch on the lip; sepals oblong- 

 elliptic, less than half as broad as the nearly rhomboid 



Sstals; lip resembling a wide-mouthed funnel. Burma. 

 .M. 5446. I.H. 21:172. C.O. 6. Var. Jamesianum, 

 Hort. (D. Jamesi&num, Reichb.). Pseudobulbs stouter 

 and stiff er: lateral lobes of lip roughened on the inner 

 surface; disk cinnabar. Gn. W. 9:485. 



7. cariniferum, Reichb. Pseudobulbs 6-10 in. tall, 

 nearly cylindric: fls. about 1^ in. across; sepals yellow- 

 ish white, fading white, narrower than the ovate white 

 petals; lip 3-lobed, the triangular lateral lobes red- 



orange, the middle lobe hairy, red-orange at the base, 

 the front part white or pale orange; spur long, obtuse. 

 Burma. 



8. L6wii, Lindl. Pseudobulbs 8-15 in. tall, slender: 

 fls. 1^-2 in. across, buff -yellow; sepals narrower than 

 the undulate petals; lip distinctly 3-lobed, the lateral 

 lobes tipped with red, the oblong middle lobe reflexed, 

 marked with 6 lines of red hairs. Borneo. B.M. 5303. 

 F.S. 23:2395. C.O. 30. 



9. f ormosum, Roxbg. Pseudobulbs up to 1J^ ft. 

 tall, cylindric: fls. 3-4 in. across, white except the yel- 

 low mark on lip; sepals oblong-elliptic, about half as 

 broad as the obovate petals; lip retuse, erose. Khasia 

 Hills. B.R. 25:64. F.S. 3:226. P.M. 6:49. C.O. 8. 

 O.R. 15: frontispiece. Var. giganteum, Hort. Fls. 4-5 

 in. across. G.C. III. 24:471. Gng. 1:118-9. F.E. 

 10:1240. F.S. 16:1633-4. G. 25:385. 



10. dracdnis, Reichb. Pseudobulbs up to 1J^ ft. 

 tall: fls. about \Yi in. across, white except for some 

 orange-red stripes at base of lip; sepals narrower than 

 the petals; lip 3-lobed, the lateral lobes small, the 

 oblong-oval middle lobe crisped and minutely toothed. 

 Burma. B.M. 5459 (as D. eburneum). 



SECTION III. 



A. Raceme secund 11. secundum 



AA. Raceme not secund. 



B. Bracts small: racemes not capitate. 



c. Fls. rosy purple, about 1 in. across . . 12. cumulatum 



cc. Fls. white, about 2y% in. across 13. Dearei 



BB. Bracts large, colored: racemes capitate 14. Bullenianum 



11. secundum, Wall. Pseudobulbs up to 2 ft. tall, 

 cylindric: fls. narrow, less than 1 in. long, rosy purple, 

 on one side of the raceme; lip with an apical orange 

 bjotch. Sumatra. B.R. 1291. B.M. 4352. C.O. 35. 

 Var. niveum, Hort. Fls. white. 



12. cumulatum, Lindl. Pseudobulbs up to 2 ft. long, 

 pendulous: fls. rosy purple, in short racemes with a 

 purple axis; sepals and petals similar, oblong; lip 

 oblong-obovate; spur obtuse, slightly curved. Burma. 

 B.M. 5703. 



13. Dearei, Reichb. Fig. 1235. Pseudobulbs up to 

 3 ft. long: fls. white, 2-2 J^ in. across, in 5-7-fld. 

 racemes; sepals lanceolate, acuminate, about one-third 

 as broad as the oval petals; lip oblong, obscurely 3- 

 lobed, a pale yellowish green band across the middle; 

 spur funnel-shaped, elongated. Philippines. V.O. 

 3:37. G.W. 1:225. 0.1912:18. C.O. 36. 



14. Bullenianum, Reichb. f. (D. salaccense, Hort., 

 not Lindl. D. erythroxdnthum, Reichb. f.). Pseudo- 

 bulbs 10-18 in. tall: racemes densely fld.; fls. yellow, 

 striped with purple; dorsal sepal and petals oblong; 

 lateral sepals oblong, acute, about as long as the obtuse 

 spur; lip oblong, from a long linear base, acute. Philip- 

 pines. 



SECTION IV. 



A. Sepals and petals not yellow. 



B. Lip deeply fimbriate 15. Devonianum 



BB. Lip entire or minutely fimbriate. 



c. Nodes of pseudobulb much thick- 

 ened. 

 D. Pseudobulbs thick. 



E. Internodes abruptly depressed- 

 globose, thickened at apex. . . 16. pendulum 

 EE. Internodes gradually thick- 

 ened toward apex. 

 F. Front lobe of lip ovate, 



reflexed, purple 17. Linawianum 



FF. Front lobe of lip orbicular- 

 ovate, yellow 18. Findlayanum 



DD. Pseudobulbs wand-like, slender.. . 19. Falconer!, 

 cc. Nodes not thickened, or but slightly 



so. 



D. Internodes usually more than 5 

 times longer than broad. 



