2992 



ROSA 



G. Flowering branchlets 

 usually unarmed: Ifts. 



generally ovate 39. nutkana 



GG. Flowering branchlels 

 prickly: Ifts. generally 



oblong 40. acicularis 



EE. Upper stipules narrow, like 



the lower. 

 F. Prickles hooked: Ifts. 



doubly serrate 41. calif ornica 



FF. Prickles straight, usually 

 slender: Ifts . usually 



simply serrate 42. pisocarpa 



DD. Lfts. 7-11. 



E. Sepals persistent. 

 F. Fls. corymbose; sepals pin- 

 nate or serrate. 

 G. Shrub 1-2 ft.: sts. with 

 numerous slender 



prickles . .43. heliophila 



GG. Shrub to 10 ft.: sts. with 

 paired stout wide- 

 based prickles 44. setipoda 



FF. Fls. 1-8; sepals entire. 

 G. Lfts. 1-2 in. long, pubes- 

 cent beneath: fls. 1-3. .45. macrophylla 

 GG. Lfts. y-l V in. long, 

 glabrous or nearly so 

 beneath: fls. usually 

 solitary, short-stalked. .46. Moyesii 

 EE. Sepals with their base fall- 

 ing off as a whole: fls. soli- 

 tary on short lateral branch- 

 lets: Ifts. 5-9, y-l in. long. 

 F. St. with bristles and prick- 

 les: Ifts. doubly serrate, 



y z -l in. long 47. gymnocarpa 



FF. Sts. without bristles: Ifts. 



simply serrate 48. Willmottiae 



33. rugdsa, Thunb. (R. ferox, Lawr. R. Regeliana, 

 Andre" & Lind. R. coruscans, Waitz). Figs. 3446-3448. 



Upright shrub, attaining 6 ft., with stout sts. densely 

 beset with prickles and bristles: Ifts. 5-9, oval to obo- 

 vate-oval, rugose, shining and dark green above, glau- 

 cescent and pubescent beneath, thick and firm, %-2 

 in. long; petioles tomentose and bristly; stipules dilated: 

 fls. solitary or few, purple or white, 2^-3^ in. across; 



3449. Bud of Madame Georges 

 Bruant rose. One of the rugosa 

 hybrids (X%). No. 33. 



3448. Rosa rugosa (X%). No. 33. 



bracts large; pedicels prickly; receptacle smooth: 

 fr. depressed-globose, brick-red, to 1 in. across. May- 

 Sept. N. China, Korea, Japan. S.Z. 1:28. B.R. 420. 

 Gt. 30:1049; 42, p. 537. G.C. II. 14:372. Gn. 46, p. 

 324; 52:384; 55, p. 434. I.H. 18:47. Gng. 1:7: 

 5:339. A.G. 13:342, 344; 18:567. C.L.A. 2:76; 

 7:624. F.E. 18:6. J.H. III. 45 : 159. Forms of typical 

 R. rugosa, which is sometimes distinguished as var. 

 Thunbergidna, C. A. Mey., are the following: Var. alba, 

 Rehd. (var. albiflbra, Koidzumi), with white fls. Gn. 

 9:452. G. 8:261. Var. albo-plena, Rehd., with double 

 white fls. Var. rdsea, Hort., with pink fls. Var. rilbra, 

 Hort., with purple fls. Var. riibro-plena, Rehd., with 

 double purple fls. Gt. 24:846. Geographical varieties, 

 not of garden origin, are the following two: Var. 

 Chamissoniana, C. A. Mey. (R. pubescens, Baker, not 

 Roxbg.) . Bristles almost entirely absent on the branches : 

 Ifts. narrower and smaller, less rugose. A double- 

 fld. form of this variety is sometimes cult, in 

 Cent. China, but apparently not yet intro. into 

 western gardens. Var. kamschatica, Regel (R. 

 kamschdtica, Vent.). With slenderer less densely 

 armed branches, thinner less rugose Ivs. and 

 smaller fls. and frs. B.M. 3149. B.R. 419. R. 

 rugosa is one of the most ornamental and at 

 the same time hardiest of the single roses, valuable 

 for shrubberies; it is very handsome on account of its 

 dark green shining foliage, large fls. appearing during 

 the whole summer, bright red conspicuous frs., and its 

 beautiful orange and scarlet fall coloring. It is also 

 attractive in winter by reason of its stout, densely 

 armed sts. Large numbers of hybrids have been raised. 

 By crossing with double-fid, garden roses, R. rugosa has 

 given rise to a new race of hybrid roses remarkable for 

 their hardiness and long blooming season; one of the 

 best known is Mme. Georges Bruant (Fig. 3449), with 

 double white fls., a cross of R. rugosa and the Tea rose 

 Sombreuil. Another cross with a form of R. chinensis 

 is R. calocdrpa, Willmott (R. rugosa var. calocdrpa, 

 Bruant), with single rose-colored fls. and handsome fr. 

 produced very abundantly. Gn. 46, p. 548; 52, p. 384. 

 R.H. 1895, pp. 446, 447. I.H. 42, p. 15. W.R. 60. 

 Remarkable for its large frs. and large fls. is R. micru- 

 gosa, Henkel (R. rugosa x R. microphylla. R. Vil- 

 mbrinii, Bean). Upright, very spiny shrub: Ifts. 7-11, 

 small, pubescent: fls. pink, 3-4 in. across: fr. depressed- 

 globose, about 1% in. across, prickly, orange-red. Gt. 

 59:1581. R.H. 1905:144. It is of vigorous growth and 

 hardy and will probably make a good hedge plant. 

 Hybrids are also known with R. multiflora (see R. 



