ROSA 



1549 



2149. A spray of Rose hips. 



42) 



EE. Fls. soUtanj, without bracts, only 

 occasionally corymbose ; sepals 

 erect, persistent. 

 F. Sepals entire: Ivs.onthe flowering 

 brancJilets nsiially 9-foUolate: 

 prickles straight, slender, scat- 

 tered, usually mixed with 

 bristles: fls. white or yellow, 



rarely pink 



Section IX. Pimpinellifoli^ (Species No. 

 FF. Sepals pinnate at the outer 

 edges: Ivs. on flowering branch- 

 lets 5-7-foliolate. 

 Prickles straight or hooked, rather stout: fls. yel- 

 low Section X. Lute^ (Species Nos. 43,44) 



Prickles slender, straight: fls. pink or white: Ifts. 



not over 14 in. long, incised 



Section XII. Minutifoli^ (Species Nos. 46,47) 

 DDD. Lvs. of flowering branchlets 11-15- 

 foliolate. 

 Prickles regularly in pairs below the base of 

 petiole: inflorescence corymbose: fr. large, very 



prickly 



Section XV. Microphyll^ (Species No. 



SUMMARY of SECTIONS. 



50) 



SUBGENUS HULTHEMIA. Only one Asiatic species, 

 distinguished from all other Hoses by the simple, 

 exstipulate leaves. 



1. P6rsica, Michx. (i?. simplicifbUa, Salisb. R. her- 

 berifdlia, Pall. Lowea berberifdlia, Lindl.). Low 

 straggling shrub, 2 ft. high, with slender, prickly 

 branches : lvs. short-petioled, oval to oblong, acute at 

 both ends, serrate, bluish green, pubescent, %-\% in. 

 long : fl.s. solitary, yellow, with red eye, about 1 in. 

 across: fr. prickly. June. N. Persia to Siberia. B.M. 

 7096. B.R. 15:1261. G.C. III. 6:8, 9, 78.-This peculiar 

 Rose is very rare in cultivation, since it is very difficult 

 to grow. It has been successfully cult, in a cool green- 

 house, exposed to the full sun, kept moist during sum- 

 mer and dry from October to March. The only way to 

 propagate it seems to be by suckers; seeds are occa- 

 sionally introduced from its native country. A hybrid of 

 this species with R. involucrata is R. Hdrdii, Cels., 

 with 5-7-foliolate lvs. and large yellowish white fls.. 

 With a deep orange eye. G.C. II. 24:469. Gn. 19, p. 473 

 (&s B. simplicifolia). P.M. 10:195. 



SUBGENUS EUROSA. 

 Section I. Systyl^. A group of about 12 species 

 (one of thetn American) , well marked by the styles 

 being connate into a slender exserted column. Stems 

 sarmentose or climbing, with hooked prickles : fls. in 

 corymbs, few or many : outer sepals pinnate, rarely 

 entire, reflexed after flowering, caducous. 



Key to Species of Section I. 

 a. Stipules pectinate: prickles usually 



in pairs ; 



AA. Stipules entire or denticulate: 

 prickles scattered. 

 B. Zivs. of floivering branches 3-5- 



foliolate, pubescent beneath 3. 



4. 

 BB. Lvs. of flowering branchlets msm- 



ally 9, glabrous 5. Wichuraiana 



BBB. Lvs. of flowering branchlets 5-7- 

 foliolate. 

 C. Sepals ovate, abruptly acumi- 

 nate: fl.-buds broadly ovate, 

 abruptly pointed : corymbs 



usually few-fid 6. 



7. 

 cc. Sepals lanceolate, gradually 

 acuminate : fl. - buds elon- 

 gated : corymbs usually 

 many-fid 8. 



multiflora 



Watsoniaua 

 setigera 



sempervirens 

 arvensis 



moschata 



2. multifldra, Thunb. {R. polydntha, Sieb. & Zucc. 

 R. intermedia, Carr. R. Wichurm, Koch). Deciduous 

 shrub, with vigorous, long, recurving or climbing 

 branches: Ifts. usually 9, obovate to oblong, acute or 

 obtuse, serrate, pubescent, %-\% in. long: fls. in many- 

 fld. pyramidal corymbs, usually white, % in. across or 

 more; sepals ovate, abruptly acuminate; styles glabrous: 

 fr. small, globular. June. Japan, China. B.M. 7119. 

 G.F.3:405; 4:535; 6:316, 317. A.G.18:677. A.F.6:1003. 

 Gn. 49, p. .368 (as R. microearpa) ; 55:432. Gug. 5:120, 

 121.— Var. Thunbergiana, Thory, is the typical form, 

 with small white single fis. Var. cdruea, Thory (var. 

 /jZewa, Dipp. R. fl6rida, Poir.). With double light pink 

 fls. B.M. 1059. B.R. 5:425. Var. platyphylla, Thory, 

 with larger lvs. and larger double, deep pink fls., is per- 

 haps a hybrid. B.R. 16:1372. Many other hybrids have 

 originated in cultivation; they usually show their par- 

 entage by the pectinate stipules. A hybrid with R. 

 rugosa is R. Iwdra, Sieb., with single, rather small 

 fls. R. polydntha, Hort.. not Sieb. & Zucc, is a trade 



2150. Section of Rose flowers (X Yf,). 

 To show two forms of styles. 



name for hybrids with R. Chinensis. Gn. 29:530. The 

 Dawson Rose, or R. Dawsonidna, is a hybrid with 

 General Jacqueminot. A very beautiful hybrid and one 

 of the best climbing Roses is Crimson Rambler (Pig. 

 2151), a vigorous grower, with large corymbs of bright 



