1130 



ONCIDIUM 



regions under more or less similar conditions. A tem- 

 perature of 55° to U0° at night, and correspondingly 

 higher during the day, will suit most species. An abun- 

 dant supply of air and light, though in partial shade, is 

 indispensable. Water must be useil freely during the 

 growing season and somewhat reduced during their 

 respective resting seasons. An occasional dipping in 

 manure water (either cow or sheep manure) will greatly 

 assist these plants in bringing to perfection their 

 flower-spikes, which are oftentimes very large. In a 

 good many species the flower-spikes are out of all pro- 

 portion to the size of the plants, and unless they are 

 assisted as indicated, they will very soon run out. 



For potting, use very soft fibrous peat, with a sprink- 

 ling of live sphagnum. Pot firmly, or the plants will be 

 very slow in taking hold. John E. Laoer. 



INDEX. 



Synopsis of Sections. 

 Li-ave.i plane, not terete. 

 Liibellum itnaller than the sepals and 



petals .' Species 



Labellum at least as large as the other 



segments, often greatly exceeding them. 

 . Lateral sepals more or less united at base. 



Species 



, Lateral sepals free. 



Ill the 



none of 



, Pseudobii 



, Pseiidnhu 



Oh I II hit, 



l!nl.<,ll : 



. /.rs. I,',; I 



blade. 



■>■ 4.">-46 

 ■< 47-48 



AAA. I^ia.subiriaiujinar in sieiu/H .-.i„.(i.-~ ^-j 



Description of Species. 



A. Lateral sepals united at base..!, micropogon 

 AA. Lateral sepals free. 



B. Sepals and petals linear, 



flaccid 2. phymatochilum 



BB. Sepals and petals broad, ser- 

 rate 3. serratum 



BBB. Sepals and petals broad, entire 

 or subentire. 



c. Fls. brown 4. superbiens 



cc. Fls. yellow 5. macranthum 



1. micTOpdgon, Reichb f. Pseudobulbs almost in 2 

 rows on the rhizome, broadly ovoid : Ivs. 4-G in. long, 

 linear-oblong, rounded at the top, leathery: raceme 

 8-10 in. long, on a long stalk, flexuous, pendulous: fls. 

 1 ^^ in. across ; sepals linear-oblong, undulate, yellow, 

 barred with brown ; petals clawed, orbicular, yellow, 

 with a deep red-brown claw; labellum yellow, smaller 

 than the petals, having 3 almost equal, rounded, clawed 

 lobes. Aug. Trop. Anier. B.M. 6971.— Var. 3up6rbum, 

 Hort., is advertised. 



2. phymatochilum, Lindl. Pseudobulbs broadly fusi- 

 form, 4-5 in. long, purplish brown, with several large 



ONCIDIUM 



scales at the base : Ivs. membranous, oblanceolate, 12-14 

 in. long : scape rather slender, over 1 ft. long, with a 

 pendent panicle more than a foot long : sepals and 

 petals linear-subulate, flaccid and somewhat twisted, 

 greenish yellow, with deep orange blotches; labellum 

 shorter than the sepals, white, with a yellow and orange 

 crest ; the middle lobe triangular-ovate, acuminate. 

 Brazil. B.M. 5214. F.S. 23:2465. G.C. 1848:139. 



3. Berr&tum, Lindl. Fig. 1523. Pseudobulbs 4-6 in. 

 long, partly enclosed by sheathing Ivs., 1-2-lvd.: Ivs. 

 about 1 ft. long and 2 in. broad: inflorescence a long, 

 twining, loosely-branched panicle, 6-10 ft. long : fls. 

 numerous, 3 in. across; upper sepals broad, reniform, 

 the lateral ones very much longer, obovate. all chocolate- 

 brown, with yellow tips and mareins. strnndy undulate, 

 serrate; petals shorter, oblong, wavy and mrl.-d so that 

 they almost meet over the ooluinn, yclh.w with brown 

 spots, margins serrate; labellum small, hastate, fleshy, 

 with a crest of 5 ridges. Winter. Peru. B. M. 5632. 

 F.S. G, p. 167. 



4. superbiens, Reichb. f. Pseudobulbs 3-4 in. long, 

 ovate to ovate-lanceolate, much flattened: Ivs. linear, 

 14 in. long and Ik-IK in. broad, some sheathing the 

 pseudobulb: panicle 2-3 ft. long, loosely branched and 

 flesuous, bearing 20-30 fls. each 2K in. in diam. : sepals 

 long-clawed, undulate, chocolate-brown with yellow tips ; 

 the upper one trowel-shaped, with a cordate base, the 

 lower pair more ovate ; petals rather smaller, with 

 shorter, broader claws, much recurved and wavy, yellow 

 with brown bars; labellum less than half as large as the 

 sepals, revolute, trowel-shaped, with auriculate side 

 lobes, brown with a yellow crest. Spring. Venezuela, 

 Colombia. B.M. 5980. 



5. macrinthum, Lindl. (0.?ias(i7«n<»n, Hort.). Pseudo- 

 bulbs ovoid or flask-shaped, 3 in. long: Ivs. narrowly 

 lanceolate, acuminate, 1 ft. long : panicle climbing, 

 loosely branched and many-fld. : fls. 3-t in. across; se- 

 pals rounded-oblong, with green claws, the upper one 

 yellowish brown, the lower pair orange-yellow; petals 

 similar, golden yellow, streaked with blood-red at the 

 base; labellum small, hastate, purple-brown, with a 

 prominent white crest. Spring and summer. Cent. 

 Amer. B.M. 5743. Gn. 24:416. F. 1871. p. 187. J.H. 

 III. .34:337.— A magnificent orchid, of which there are 

 several varieties, some of secondary merit. 



Petals clawed, with a broad, 

 obovate or rounded blade, 

 not much smaller than the 

 labellum. 



yi.i. yellow: column wings 

 short, quadrate 



Marshallianum 

 Forbesii 



elhi 



fiiluwn icings large, sharpUi 



f, tills mill dorsal sepals obo- 

 iiiti . eiiridlate, not clawed. .10. 



I'ltiitx and dorsal sepals sub- 

 .■iiniilin: very Small: label- 

 lum hirger than the rest of 



the tloiver. 



Lalielluni lehile, spotted with 



11. cucullatum 



the III 1,1 



of a iliffeveni form. 



. Fls. wh Ite.spotted with purple.}o. Phalaenopsis 



. Fls. yellow or greenish, spot- 

 ted and barred with brown. 



, Crest serrate H;. longipes 



Crest a smooth, heart-shaped 

 callus 17. dasystyle 



, Fls. entirely yellow 18. concolor 



