2320 



OCTOMERIA 



ODONTOGLOSSUM 



minate; petals lanceolate, labellum lyrate, 3-lobed, 

 fleshy at base, otherwise hyaline, margin irregularly 

 denticulate, disk bicarinate. OAKES AMES. 



ODONTADENIA (Greek, toothed glands). Apocy- 

 nacese. Here belongs the tropical yellow-flowered 

 climber sold as Dipladenia Harrisii, which rivals in 

 beauty the well-known greenhouse allamandas. 



Tall shrubby climbers or lianas: Ivs. opposite: cymes 

 loose, usually ample, rarely few-fid . and scarcely 

 branched; calyx 5-parted, the lobes remarkably blunt or 

 rounded; corolla-lobes twisted in the pointed bud, over- 

 lapping to the right and twisted to the left; stamens 

 fixed at the top of the narrow part of the tube; fls. 

 yellow, whereas those of Dipladenia are yellow only in 

 throat if at all. The genus is further distinguished from 

 Dipladenia by the shape of the calyx-lobes and by the 

 cup-shaped group of toothed glands below the pistil. 

 Species 20-25, Trop. S. Amer. and Cent. Amer. 



grandiflora, Schum. (0. specidsa, Benth. Dipladenia 

 Hdrrisii, Hook.). Shrubby branched climber: largest 

 Ivs. 10-15 x 4-5 in., oblong, tapering, scarcely leathery, 

 feather-veined, often purplish beneath; petioles stout, 

 scarcely 1 in. long: racemes axillary and terminal; 

 pedicels red, often 1 in. long, curved downward; corolla- 

 tube with a roundish base about K m - long and thick, 

 then suddenly constricted, then gradually widening into 

 a funnel-shaped fl. Brazil, Guiana, Trinidad. B.M. 

 4825. The fls. are fragrant, about 3 in. across, funnel- 

 shaped, with 5 rounded, spreading lobes, and are more 

 or less streaked with red in the throat, at the base of the 

 lobes, and on the back of the tube. The treatment 

 for dipladenias (see Dipladenia, Vol. II) should be 

 attempted for Odpntadenia, but O. grandiflora perhaps 

 grows at lower altitudes, and may require the treatment 

 usually given to hothouse vines. 



O. nitida, Muell. Arg. (O. cqrdata, A. DC.) from Trop. S. Amer., 

 is a twining glabrous shrub with yellow corolla bearing a band of 

 vermilion below the middle of the narrow tube: Ivs. oblong or 

 elliptic, 4-6 in. long: fls. nodding on axillary pedicels, the tube 

 narrow and constricted at the colored part, the 5 lobes broad-ovate 

 and acute. It is referred to the genus Angadenia in B.M. 8233 (A. 

 nitida, Miers), and is probably best understood when thus separated. 



WILHELM MILLER. 



L. H. B.f 



ODONTIODA (compounded from Odontoglossum and 

 Cochlioda) Orchidacese. A genus established to contain 

 the hybrids between Odontoglossum and Cochlioda. 



The following are some of these hybrids: 0. beechense 

 =O. Rolfese x C. Noetzliana. 0. Bdhnhdffise (O. cir- 

 rhosum x C. vulcanica). Fls. blood-red, the sepals 

 and petals narrow, marked somewhat with white, 

 tinged slightly purple at base; lip with a yellow crest 

 with a few red spots. 0. Bdltonii=O. Vuylstekeae 

 X C. Noetzliana. -O. Bradshawiae (O. crispum x C. 

 Noetzliana). Fls. resembling in shape those of the 

 first parent, but smaller; sepals and petals cinnabar- 

 scarlet; lip 3-lobed, whitish, the lobes scarlet-tipped, 

 and a spot of the same color in front of the yellow 

 crest. Gn. 71, p. 55. G.M. 56:337. O. Brewii= 

 O. Harryanum x C. Charlesworthii. 0. Chdrles- 

 worthii (O. Harryanum x C. Noetzliana). Fls. resem- 

 bling in shape those of the cochlioda, ruby-crimson, 

 except the spiny yellow crest. Gn. 72, p. 301. J.H. 

 III. 56: 583. O. chelseiensis (O. crispum x C. vul- 

 canica). Fls. intermediate in shape between those of 

 the parents, compactly arranged, carmine-rose, lightly 

 marbled with yellow on the sepals; lip light yellow, 

 3-lobed, the lobes tipped with carmine-rose, and a 

 darker blotch in front of the crest. O.K. 17:48. G.M. 

 52:70. Gn. 73, p. 112. 0. chessingtonensis=O. Rolfese 

 X C. Noetzliana. 0. Cooksonias=O. ardentissimum x 

 C. Noetzliana. O. 1913, p. 103. O. Corneydna=O. 

 Lambeauianum x C. Noetzliana. O. Cravenidna (O. cor- 

 datum x C. Noetzliana). Fls. more nearly resembling 

 in shape those of the cochlioda; sepals and petals red; 

 lip broad, salmon-red, white in front, and with a yellow 



crest. G.M. 51:25. 0. cuprea=O. cristatum x C. 

 Noetzliana. 0. daltonensis=O. Phrebe x C. Noetz- 

 liana. O. Devossidna (O. Edwardii x C. Noetzliana). 

 Panicle compact; fls. crimson, the 3-lobed lip lighter at 

 the apex, and with a yellow crest. O.R. 16:41. 0, 

 eborlacum (origin doubtful). Fls. medium-sized, 

 scarlet; lip with pale yellow markings. 0. Fldryi=O. 

 Andersonianum x C. Noetzliana. 0. gattonensis=O. 

 Kegeljanii x C. Noetzliana. 0. Goodsonise (origin 

 doubtful). Fls. large, rosy red, irregularly marked 

 with cream-color; crest of lip yellow, somewhat red- 

 marked in front. G.C. .III. 45:195. G.M. 53:302. 

 0. Grairedna=Q. Rossii majus x C. Noetzliana. 

 0. grata=Q. tripudians x C. Noetzliana. 0. heat- 

 onensis (O. cirrhosum x C. sanguinea). Fls. white, 

 the sepals and petals oblong-lanceolate, suffused at 

 the apex and spotted below with rosy purple; lip ovate, 

 spreading, acuminate and recurved at the rosy purple 

 apex. B.M. 8133. 0. Hemptinneana=O. eximium x 

 C. Noetzliana. 0. Hyeanse=Q. ardentissimum x C. 

 Noetzliana. 0. igneaQ. Lindenii x C. Noetzliana. 

 O. Jessopise=O. "Queen Alexandra" x C. Noetzliana. 

 0. keighleyensis=O. cirrhosum x C. Noetzliana. 0. 

 Lambeauidna=O. Lambeauianum x C. Noetzliana. 

 0. Leedna=O. spectabile x C. Noetzliana. 0. Lutetia= 

 0. luteo-purpureum x C. Noetzliana. 0. macula- 

 tissimaO. amcenum x C. sanguinea. 0. M6ssise= 

 O. maculatum x C. Noetzliana. 0. nevense=O. neva- 

 dense x C. Noetzliana. 0. oakwoodiensis=Qdontiod& 

 Bradshawise x O. percultum. 0. rawdonensis=O. 

 ardentissimum x Odontioda Charlesworthii 1 . 0. 

 R6lfei=O. Hunnewellianum x C. vulcanica. 0. rose- 

 fieldiensis (O. triumphans Mr. de B. Crawshay x C. 

 Noetzliana). Fls. scarlet, slightly shaded yellow; lip 

 yellow, red-tinged, the basal ridges bright yellow. 

 G.C. III. 49:308. 0. Sdnderse=O. percultum x C. 

 Noetzliana. O. Schroederi=O. crispum x Odontioda 

 Bradshawise . . S eymourse = Odiontioda Charles- 

 worthii x Odiontioda Bradshawise. 0. Sbymourii= 

 O. Uroskinneri x C. vulcanica. 0. specibsa= (?) . 

 O. Thwditesii (O. Harryanum x C. vulcanica). Sepala 

 and petals bronzy claret; lip lilac-purple with a yellow 

 crest. J.H. III. 57:147. 0. Vuylstekeas (O. nobile x 

 C. Noetzliana). Fls. about 23/2 i n - across; sepals and 

 petals ovate-lanceolate, with a crimson base, the upper 

 portion white with red spots, the margin pink; lip 

 fiddle-shaped, yellow at base, the rounded lateral 

 lobes crimson, the rounded middle lobe white, crimson- 

 spotted. B.M. 7990. R.B. 33:169. Gn. 65, p. 433. 

 0. wickhamensis=Q. crispum x C. sanguinea. 0. 

 Wilsonii = O. Pescatorei x C. vulcanica. 0. Zendbia. 

 G.C. III. 55:226. GEORGE V. NASH. 



ODONTOCIDIUM (compounded from Odontoglos- 

 sum and Oncidium). Orchidacese. A genus established 

 to contain the hybrids between Odontoglossum and- 

 Oncidium. 



0. Edwarddtum=Qd<mtoglossmn Edwardii x Oncid- 

 ium serratum.^-0. Fowlerianum= Odontoglossum cir- 

 rhosum x Oncidium Forbesii. G.M. 54:878. 



ODONTOGLOSSUM (Greek, tooth-tongue; in allu- 

 sion to the crest on the labellum) . Orchidacese. Orchids 

 which on account of their handsome flowers are great 

 favorites of cultivators. 0. crispum is one of the finest 

 of all orchids. 



Plants epiphytic, with short rhizomes and 2-lvd. 

 pseudobulbs, often with sheathing Ivs. at the base: 

 fls. in few- to many-fld. racemes or panicles arising from 

 the base of the pseudobulb; sepals and petals spreading, 

 free, or the lateral sepals rarely somewhat united at 

 the base; base of the labellum ascending parallel to the 

 column and sometimes adnate to the latter; lateral 

 lobes small, often erect; middle lobe large, spreading, 

 variously shaped; column clavate, narrowed at the 

 base, longer than in Oncidium. About 100 species, 



