1132 



ONCIDIUM 



late: scape very slender, (3-7 in. long, bearing 2-5 lis., 

 each 1% in. across: dorsal sepals and petals subequal, 

 lanceolate, pale yellow, blotched with purple-brown; 

 lateral sepals larger, united half-way; labellum large, 

 sulfur-yellow, with a blackish purple callus; lateral 

 lobes small, triangular; middle lobe round tan-shaped 

 menihranous and undulate. .Jan., Feb. Organ Mts., 

 Brazil. B.M. 6494. 



IS. cbncolor, Hook. (O. umjuiculAtum, Klotzsch). 

 Pseudubulbs small, oval-oblong, slightly furrowed: Ivs. 

 lanceolate: fls. 1-2 in. in diara., rich yellow, borne on 

 pendulous racemes 1-2 ft. long; lateral lobes united for 

 half their length, smaller than the dorsal sepals and 

 petals, which are obovate; labellum twice as long as 

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

 running down on the base. April-June. Ur^aii Mts. 

 B.M. 3752. I. H. 30:487. R.H. 1881:30. Un. 13:111. -A 

 plant of close and compact habit, making one of the 

 most attractive yellow coolhouse orchids. 



A. Labellum with a large reiii- 



form mid-lobe: lateral 

 lohrs small or none. 



B. Petals much broader than the 

 sepals 19. 



20. 



BB. Petals and sepals nearly of 

 the same size. 

 c. Fls. over 2 in. across: label- 

 lum large, forming the most 

 eunspicuous part of the 



flower: panicle stout 21. 



22. 



ampliatum 

 excavatum 



tigrinum 

 splendidum 



CO. Fls. medium-sized, mimer- 

 ous, in long, climbing pan- 

 icles. 



D. Sepals and petals linear- 



lanrrnlntr. arute. 



E. Fls. ii-hil, iiihI purple 23. incurvum 



EE. Fls. ijrlhnr uii.l hfown. 



F. Colunni iriuijs rerij truncate: 



crest of several interrupted 



ridges 24. Baueri 



FF. Column wings rounded, 



slightly crentilate 25. altissimum 



PFF. Column wings erose, sphace- 

 late 26. sphacelatum 



FFFF. Column wings falcate, den- 

 tate 27. ref lexum 



T>i>. Sepals lanceolate: petals 



spatulate 28. Batemannianum 



DDD. Sepals and petals linear to 

 nhlou.i. <ihl,ise. 

 E. Color of Itiliillum yellow ... .29. Harrisonianum 



EE. Color of labellum white 30. leucochilum 



AA. Labellum with the middle 

 lobe variously shaped, 

 rarely reniform, but more 

 so than the lateral lobes, 

 large. 



B. Fls. rose-colored 31. ornithorhynchum 



BB. Fls. yellow, variously 

 marked and spotted. 

 c. Crest pulvinate, pubescent . .32. divaricatum 

 33. pulvinatum 

 CC. Crest not pulvinate. 



D. Apex of labellum deeply 



S-lobed 34. Warneri 



DD. Ape.r of labellum apirulate, 



la/rral luh.x t.u.ili-iil;,' 35. maculatum 



DDD. Api'.r ■•( lal.rlhini In ,■ r, I ,/ 

 eiiinrijiiialr. hilrrul labrs 

 large. 



E. Middle lob e broadly reni- 



form, clawed 36. Limminghii 



EE. Middle lobe not clawed, sepa- 

 rated from the lateral lobes 

 mcrclji by a sharp onstric- 



.37. cheirophorum 



ONCIUIUM 



long-lanceolate, 9 in. long: inflorescence a large panicle 

 1-3 ft. long, with numerous fls., which are yellow, spotted 

 with red at the bases of the segments; sepals and 

 petals MiKill. the foiiiier intiri-lv free; hibellum reni- 

 form. spr.Mdiui;, wavv, 1'.. ill. le-ros.s, luirrow at the 



base. Willi tw.i small hiteriil I 's and a pruiniiient lobed 



crest. M:n-ch-Mav. Tliruu^li.nit the coast of Kicaragua. 

 B.R. 20:1699. -The flowers are produced in magnificent 

 panicles. In var. majus. Hurt., they are half again as. 

 large as in the tvj.e. P.S. 20:2140. G.C. III. 17:173. 

 Gn. 4."), p. 491. G.M. 37:475. 





1525. 



tigr. 



\ (O. B.Tkeril. to sho 



• habit. 



19. ampliitum, Liudl. Pseudobulbs 

 pressed, bright green with purple 

 blackish purple and wrinkled with ag 



subrotund, com- 

 spots, becoming 

 e: Ivs. plane, ob- 



20. excavatum, Lindl. [O. aurosum, Reichb. f. &. 

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

 Ivs. l'.j ft. long, leathery, shining green: panicle 3-5 ft. 

 long, with numerous fls. \% in. across, yi-llnw. sjiotted 

 with brown : sepals obovate. olituse. frer ; p. tal> oMcing, 

 refuse; labellum sessile, with several Knik.ii 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 flowers on each panicle. 



21. tigrlnum, LaLlave & Lex. {O. Bdrkerl, Lindl. 

 O. unguiculAtum, Lindl.). Pig. 1525. Pseudobulbs 

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

 1 ft. long: panicle erect, stout, 3 ft. high : fls. 2% in. 

 across; sepals and petals similar, lanceolate, undulate, 

 rich reddish brown, with few bars and spots of yellow; 

 labellum yellow, with a very large, oibicnlar-reniform 

 blade supported on a long claw, lateral lobes oblong. 

 Winter. Mvx. I.H. 1 :2; 22:221. P.M. 14:97. R.H. 1889, 

 p. 176. — Very much like O. splendidum, from which it 

 differs by the longer claw of tin- labellum having a thick 

 keel, ami tin- oblong lateral lob.s of the labellum. Both 

 are among the most showy ()iiridiums in cultivation. 

 Var. grrandiilorum, Hort., is advertised. 



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

 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, yellow- 

 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.'^ni.T. splendidum). F. 8.18:1825. Gn. 51:1121. 

 R.B. 17:108. G.C. 1S71:42; III. 3:108. 



23. inctSrvum, Barker. Pseudobulbs ovate, compressed 

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

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

 fully arched: fls. IK 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. Batleri, Lindl. {O. altissimum, Lindl.). Pseudo- 

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

 ]>anirle with numerous branches and rather dingy fls.: 

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

 lanceolate, undulate, yellow, with -ed spots ; labellum 

 with 2 spreading lateral lobes and a reniform emargi- 

 nate mid-lobe, yellow, with a reddish band. Trop. Amer. 

 B.R. 19:1651 (as O. altissimum).— A gigantic epiphyte 



