ODONTOGLOSSUM 



O. delicatum. O. Edyertoniitiuun is probably Egertoni. 

 O. Karwtnskii, Reichb. f., is probably a synonym of O. Iseve. 



O. leopardlnum. See No. 5. O. Phalcenopsis, Linden 

 & Reichb. t'.= Miltonia Phalsenopsis. O. Rcezlii, Reichb. f. 

 =Miltonia Rcezlii. O. splendens. O. vexillarium, Reichb. f.= 

 Miltonia vexillaria. O. Victoriense and vars. album and su- 

 perbum. O. Wdrneri. Lindl.=Oneidium Warneri. O. Warsce- 

 wiczii, Reichb. f.=Miltonia Endresii. O. Weltoni, Hort.=Mil- 

 tonia Warscewiczii. HEINRICH HASSELBRING. 



CEC6CLADES. See under DendropJiylax. 



(ENOTHfiRA (said to be Greek for wine-scenting; in 

 allusion to the ancient use of the roots). Onagrdcece. 

 EVENING PRIMROSE. Herbs, or sometimes shrubby at 

 the base, with alternate simple or pinnatisect leaves and 

 mostly showy fls., which are yellow, white or rose-color: 

 calyx with a tube prolonged beyond the angled or cylin- 

 drical ovary, with 4 usually strongly reflexed lobes; 

 petals 4, mostly obovate or spatulate; stamens 8, with 

 narrow mostly versatile anthers : fruit a 4-valved locu- 

 licidal capsule. The CEnotheras are mostly dry-soil 

 plants and are chiefly North American. Some of them 

 are South American, and Bentham & Hooker admit one 

 plant which grows in Tasmania. The genus is poly- 

 morphous, and there is consequently great difference of 

 opinion as to generic bounds. What is commonly re- 

 garded as one genus is broken up into ten or a dozen 

 genera by some authors. These minor genera are here 

 treated as subgenera, for the group is fairly homoge- 

 neous from the horticultural point of view, and an en- 

 tirely new set of names in several strange genera could 

 scarcely be forced on the trade. The Godetia section 

 contains some excellent flower-garden plants, and some 

 of the true CEnotheras make glowing displays of yellow 

 in the border; but the greater number of the species 

 are of only secondary importance to the cultivator. 

 Amongst the best of the border-plant species are CE. 

 fruticosa, var. Youngii, CE. glauca, var. Fraseri, CE. 

 ccespitosa, CE. Missouriensis, CE. speciosa. For a 

 botanical revision of the North American species, see 

 Sereno Watson, Proc. Amer. Acad. Arts &"Sci. 8:573 

 (May 13, 1873). L> H . B. 



There is nothing special to say about the culture of 

 CEnotheras except to note the tender kinds and the bi- 

 ennials. All do well in ordinary garden soil, enjoying 

 sunshine. They are easily raised from seeds and cut- 

 tings. CE. acaulis, eximia (properly CE. ccespitosa) are 

 low-growing biennials which do well treated as annuals. 

 They will not endure the winter. CE. Missouriensis is 

 a splendid trailer, with enormous yellow flowers, and 

 seed vessels. It is quite hardy, and a fine rock garden 

 plant. CE. biennis, the common Evening Primrose, is 

 rather weedy, and only fit for the wilder parts of the 

 garden. CE. biennis, var. grandiflora, is a better form. 

 CE. fruticosa and CE. Fraseri are two of our best 

 border kinds, with stiff, branching stems. CE. linearis 

 is a pretty little species, often naturalized but well 

 worth growing. Childs' Mexican Primrose is tender, 

 but makes a pretty plant for hanging pots. CE. speciosa 

 is a very fine species, but spreads so quickly by under- 

 ground stems as to become a weed in favorable situa- 

 tions: it is good for naturalizing in wild grounds. 



T. D. HATFIELD. 



CEnothera is represented in Colorado by a diversity 

 of specific forms which have been segregated into no 

 fewer than six genera. Of these nearly all are peren- 

 nial, CE. albicanlis, Pursh, being an interesting excep- 

 tion. Of the perennials, CE. serrulata will bloom the 

 first season from seed, and probably some others will if 

 sown early. A few kinds are slow to germinate, notably 

 CE. brachycarpa and CE. ccpspitosa, which usually pro- 

 duce some plants the first season, but most of the seeds 

 remain dormant until the second year. CE. brachycarpa 

 includes two forms of specific rank, the typical form 

 belonging to the western slope of the Rocky mountains 

 and agreeing with Britton & Brown's description and 

 illustration, but flowers 2 inches broad, seeds purplish 

 black. The CE. brachycarpa of the eastern slope, so 

 called by botanists and collectors, has flowers 4 to 5 

 inches broad, capsule 1% to 2 inches long (!), broadly 

 winged, seeds larger than of any other species, of angu- 

 lar form, light brown. Foliage resembling that of CE. 

 Missouriensis and seems to be most nearly related to 



71 



CENOTHERA 



1119 



the latter species. The western type seems not to be in 

 the trade. 



As to culture, most sorts seem to prefer a porous soil 

 with a rather large proportion of sand, an ideal soil 

 consisting largely of decomposed granite with some 

 vegetable matter. They seem to be quite adaptive, and 

 CE. brachycarpa, Missouriensis, etc., are found some- 

 times in stiif clay soil. An abundance of sunshine is 

 natural to most sorts. D> M> ANDREWS- 



M Stigma capitate or disk-like, entire 



B. Calyx-tube filiform I. TARAXIA, below. 



BB. Calyx-tube short, obconic or funnelform. 



II. SPH^EROSTIGMA, below. 

 AA. Stigma deeply 4-cleft or at least 4-toothed. 

 B. Stamens of equal length. 



c. Calyx-tube shorter than the ovary 



III. MERIOLIX, p. 1120 



CO. Calyx-tube 'Usually much exceeding the 

 ovary . 



D. Seeds angled, horizontal in the pod 



IV. ONAGRA, p. 1120 

 DD. Seeds not angled, ascending. 



E. Fls. yellow, erect in bud: seeds in 2 



rows in each locule V. CENOTHERA, p. 1120 



EE. Fls. white or pink, drooping in bud: 



seeds in 1 row VI. ANOGRA, p. 1120 



BB. Stamens of unequal length. 

 c. Anthers versatile. 



D. Plant caulescent (with stem). 



E. Fls. yellow. 



F. Seeds crested VII. MEGAPTERIUM, p. 1120 



FF. Seeds not crested VIII. KNEIFFIA, p. 1120 



EE. Fls. ivhite, pink or reddish 



IX. HARTMANNIA, p. 1121 

 DD. Plant stemless. 



E. Capsule with wrinkled wing-angles 



X. PACHYLOPHUS, p. 1121 

 EE. Capsule with plane or entire wing-an- 

 gles XI. LAVAUXIA, p. 1121 



cc. Anthers attached at base, erect or nearly 



so XII. GODETIA, p. 1121 



I. SUBGENUS TARAXIA. Stemless, usually perennial: 



stigma capitate: calyx-tube filiform: capsule 

 sessile, narrow to ovate, usually not winged: fls. 

 yellow. 



1. ovata, Nutt. Perennial, slightly pubescent: Ivs. 

 ovate to lance-oblong, 8 in. or less long, acute, serru- 

 late: calyx-tube sometimes 4 in. long, the petals less 

 than 1 in. long and yellow: fl.-bud erect: capsule % in. 

 long. Calif. 



II. SUBGENUS SPH^EROSTIGMA. Stem-bearing: stigma 



capitate: calyx-tube short, inversely conic or fun- 

 nelform: capsule sessile, linear, not winged: fls. 

 various. 



2. bistdrta, Nutt. One to 2 ft., the base decumbent, 

 hairy and pubescent: radical Ivs. spatulate to lanceo- 

 late and petiolate, dentate: stem Ivs. mostly sessile- 

 ovate to narrow-lanceolate and about 1 in. long, dentate: 

 fls. yellow, turning green, the petals (about % in. long) 

 usually with a brown spot at the base : calyx-tube 1-3 

 in. long : capsule % in. or less long, 4-angled, con- 

 torted. S. Calif. 



Var. Veitchiana, Hook. More slender: radical Ivs. 

 narrow-oblanceolate and long-petioled : capsule longer 

 and narrower (1-1% in. long) and little contorted. 

 S. Calif. B.M. 5078. 



