2344 



ONCIDIUM 



ONCIDIUM 



the sepals, broad, flat, bilobed, with 2 reddish ridges 

 running down on the base. April- June. Organ Mts. 

 B.M. 3752. I.H. 30:487. R.H. 1881:30. Gn. 13:58. 

 G. 26:237; 27:133; 35:301. A plant of close and com- 

 pact habit, making one of the most attractive yellow 

 coolhouse orchids. Var. rhod6ptera, Hort. Upper part 

 of column-wings and margin of stigma red. 



A. Labellum with a large reniform mid- 

 lobe; lateral lobes small or none. 



B. Petals much broader than the sepals 19. ampliatum 



20. excavatum 

 BB. Petals and sepals nearly of the same 



size. 



c. Fls. over 2 in. across; labellum 

 large, forming the most conspic- 

 uous part of the ft,.; panicle 



stout 21. tigrinum 



22. splendidum 

 cc. Fls. medium-sized, numerous, in 



long, climbing panicles. 

 D. Sepals and petals linear- 

 lanceolate, acute. 



E. Color of fls. white and purple.23. incurvum 

 EE. Color of fls. yellow and 



brown. 



F. Column-wings very trun- 

 cate; crest of several in- 

 terrupted ridges 24. Baueri 



FF. Column-wings rounded, 



slightly crenulate 25. altissimum 



FFF. Column -wings erase, , 



sphacelate 26. sphacelatum 



FFFF. Column-wings falcate, den- 

 tate 27. reflexum 



DD. Sepals lanceolate; petals spatu- 



late 28. Bateman- 



DDD. Sepals and petals linear to [nianum 



oblong, obtuse. 

 E. Color of labellum yellow. . . .29. Harrison- 



[ianum 



EE. Color of labellum white 30. leucochilum 



AA. Labellum with the middle lobe vari- 

 ously shaped, rarely reniform, but 

 more so than the lateral lobes, large. 



B. Fls. rose-colored 31. ornithorhyn- 



BB. Fls. yellow, variously marked and [chum 



spotted. 



c. Crest pulvinate, pubescent 32. divaricatum 



33. pulvinatum 

 cc. Crest not pulvinate. 



D. Apex of labellum deeply 2- 



lobed 34. Warneri 



DD. Apex of labellum apiculate, 



lateral lobes tooth-like 35. maculatum 



DDD. Apex of labellum merely emar-> 



ginate, lateral lobes large. 

 E. Middle lobe broadly reni- 

 form, clawed 36. Limminghii 



EE. Middle lobe not clawed, sepa- 

 rated from the lateral lobes 

 merely by a sharp constric- 

 tion 37. cheirophorum 



19. ampliatum, Lindl. Pseudobulbs subrotund, com- 

 pressed, bright green with purple spots, becoming 

 blackish purple and wrinkled with age: Ivs. plane, 

 oblong-lanceolate, 9 in. long: infl. a large panicle 1-3 

 ft. long, with numerous fls., which are yellow, spotted 

 with red at the bases of the segms.; sepals and petals 

 small, the former entirely free ; labellum reniform, spread- 

 ing, wavy, 1 Yz in. across, narrow at the base, with 2 small 

 lateral lobes and a prominent lobed crest. March-May. 

 Throughout the coast of Nicaragua. B.R. 1699. The 

 fls. are produced in magnificent panicles. In var. 

 majus, Hort., they are half again as large as in the 

 type. F.S. 20:2140, 2141. G.C. III. 17:173. Gn. 45, 

 p. 491. G.M. 37:475. C.L.A. 6:166. G. 17:202. J.H. 

 111.54:295. 



20. excavatum, Lindl. (0. aurbsum, Reichb. f. & 

 Warscz.). Pseudobulbs oblong, compressed, 3-5 in. long: 

 Ivs. 1 Yi ft- long, leathery, shining green : panicle 3-5 ft. 

 long, with numerous fls. 1 Yi in. across, yellow, spotted 



num (O. Barker!) , to 

 show habit. 



with brown; sepals obovate, obtuse, free; petals oblong, 

 retuse; labellum sessile, with several broken ridges 

 near the base, pandurate, excavated on the under side; 

 middle lobe rotund, emarginate. Autumn. Peru. B.M. 

 5293. I.H. 17:34. Strong plants produce as many as 

 100 fls. on each panicle. 



21. tigrinum, LaLlave & Lex. (0. Bdrkeri, Lindl. 

 0. unguiculalum, Lindl.). Fig. 2579. Pseudobulbs oval, 

 compressed, 2-lvd.: Ivs. oblong-lanceolate, thick, 

 1 ft. long: panicle erect, stout, 3 ft. high; fls. lYi in. 



across; sepals 

 and petals simi- 

 lar, lanceolate, 

 undulate, rich 

 reddish brown, 

 with few bars 

 and spots of 

 yellow; labellum 

 yellow, with a 

 very large ; or- 



^vu m/^^u bicular-reniform 

 2579. Onodium tign- ^lltH^? blade supported 



on a long claw, 

 lateral lobes ob- 

 long. Winter. 

 Mex. I.H. 1:2; 

 22:221. P.M. 14:97. R.H. 1889, p. 176 Very much 

 like 0. splendidum, from which it differs by the longer 

 claw of the labellum having a thick keel, and the 

 oblong lateral lobes of the labellum. Both are among 

 the most showy pncidiums in cult. Var. grandiflSrum, 

 Hort., is advertised. Var. Crodkii, Hort. Sepals and 

 petals marked with light brown bands. 



22. splendidum, A. Rich. Pseudobulbs small, round, 

 compressed, 1-lvd.: Ivs. leathery, oblong-ovate, 6-12 

 in. long: fl.-stalk erect, 2 ft. long; fls. 3 in. across; sepals 

 and petals similar, lance-oblong, acute, recurved, yel- 

 low-green, with broad brown bands; labellum very large, 

 yellow, the broad claw of the middle lobe expanding 

 into a large reniform blade; lateral lobes small, rotund. 

 Spring. Guatemala and Mex. B.M. 5878 (as O. tigri- 

 num var. splendidum). F.S. 18:1825. Gn. 51:410. 

 R.B. 17:108. G.C. 1871:42; III. 3:108. 



23. incurvum, Barker. Pseudobulbs ovate, com- 

 pressed and ribbed, 2 in. long: Ivs. 9 in. long, ensiform, 

 acute: panicle 2-3 ft. long, slender, much branched and 

 gracefully arched; fls. 1}$ in. across, numerous; sepals 

 and petals linear-lanceolate, undulate, white, banded 

 with purple; labellum white, with a purple blotch; 

 lateral lobes rotund, small; middle lobe subreniform, 

 concave. Bears numerous panicles in autumn. Mex. 

 B.M. 4824. B.R. 31:64. I.H. 2:49; 29:444 (white 

 variety). 



24. Baueri, Lindl. (0. altissimum, Lindl.). Pseudo- 

 bulbs oblong, compressed: Ivs. ensiform, rigid, keeled: 

 panicle with numerous branches and rather dingy fls.; 

 sepals and petals about as long as the labellum, linear- 

 lanceolate, undulate, yellow, with red spots; labellum 

 with 2 spreading lateral lobes and a reniform emargi- 

 nate midlobe, yellow, with a reddish band. Trop. Amer. 

 B.R. 1651 (as 0. altissimum). A gigantic epiphyte 

 with fl.-sts. 6-9 ft. long and "Ivs. as long." It has been 

 confused with 0. altissimum. 



25. altissimum, Swartz. Pseudobulbs nearly rotund, 

 much compressed and edged: Ivs. 1-2 at the top and 

 several at the base of the pseudpbulb, ensiform, keeled, 

 1^-2 ft. long: infl., an almost simple, drooping raceme, 

 4-6 ft. long; sepals and petals free, similar, spreading, 

 linear-lanceolate, undulate, pale yellow, with olive- 

 brown blotches; labellum nearly as long as the petals, 

 fiddle-shaped, with the middle lobe reniform, spreading, 

 yellow, with a brown band near the center, prominently 

 crested. Aug. W. Indies. B.M. 2990. B.R. 1851. 



26. sphacelatum, Lindl. Pseudobulbs elongate-ovate, 

 compressed: Ivs. long, ensiform, apex recurved: scape 



