ROSA 



ROSA 



2991 



Section 7. CAROLIN.E. Contains only American species. 

 Upright, mostly low shrubs: sts. slender, with usually 

 straight prickles, placed in pairs and often mixed with 

 bristles: upper stipules usually narrow: corymbs gen- 

 erally few-fld.; sepals spreading after flowering, cadu- 

 cous, the outer ones entire or with few erect lobes: 

 achenes inserted exclusively at the bottom of the usually 

 depressed-globose receptacle. 



A. Pedicels rather long: Ifts. 5-9. 



B. Lfts. finely many-toothed: prickles 



usually hooked: stipules convolute. . 28. palustris 

 BB. Lfts. coarsely toothed: prickles usu- 

 ally straight and slender: stipules 

 flat. 



c. Branches prickly only at the nodes 

 or unarmed, only vigorous shoots 

 bristly. 

 D. Prickles hooked: Ifts. shining 



above 29. virginiana 



DD. Prickles straight or nearly so: 



Ifts. dull abate 30. Carolina 



cc. Branches densely bristly 31. nitida 



AA. Pedicels very short: Ifts. 7-11, small 



and narrow 32. foliolosa 



28. palustris, Marsh. (R. Carolina, Auth., not Linn, 

 .ft. corymbosa, Ehrh. R. pennsylvanica, Michx.). Fig. 

 3443. Upright shrub, attaining 8 ft., with slender sts.: 

 Ifts. usually 7, elliptic to narrow-oblong, acute at both 

 ends, usually pubescent beneath, %-2 in. long; stipules 

 narrow: fls. usually corymbose, pink, about 2 in. across: 

 fr. depressed-globose, glandular-hispid, about J^jin. 

 high, like those of the following species. June- Aug. 

 Xova Scotia to Minn., south to Fla. and Miss., preferring 

 swampy and moist ground. Em. 2:488. B.B. (ed. 2) 

 2:285." W.R. 1:68. Mn. 1, p. 86. Var. Nuttalliana, 

 Hort., has larger fls. appearing later and continuing 

 until Sept. 



29. virginiana, Mill. (R. lucida, Ehrh. R. humilis 

 var. lucida, Best). Shrub, 6 ft. high, with few or no 

 suckers: prickles sometimes hooked: Ifts. 7-9, elliptic 

 to obovate-elliptic, dark green and shining above, 

 thickish, often slightly pubescent beneath, J^-1J^ in. 

 long; stipules somewhat dilated: fls. usually few or 

 solitary, about 2 in. across; sepals usually entire: fr. 

 like that of the preceding. June, July. Newfoundland 

 to X. Y. and Pa. B.B. (ed. 2) 2:285. Gn. 55, p. 428; 71, 

 p. 493. Gt. 56:1564, fig. 2. W.R. 63. Well adapted 

 for borders of shrubberies, handsome in summer with 

 its shining foliage and bright pink fls.; ornamental in 

 winter with the brownish red sts. and red frs. remaining 

 plump until the following spring. Var. alba, Willmott. 



3447. Fruits of Rosa nigosa. ( X. \Q 



3446. Semi-double 

 Rosa mgosa 

 No. 33. 



has white fls. and green sts. A.F. 12:1098. Gng. 5:306. 

 M.D.G. 1904:205. W.R. 63a. Var. plena, Hort. (R. 

 rdpa, Bosc). With double fls. 



30. Carolina, Linn. (R. humilis, Marsh. R. parviflora, 

 Ehrh. R. virginiana var. humilis, Schneid. R. Lyoni, 

 Pursh). Fig. 3432. Shrub, 3 ft. or sometimes 6 ft. high, 

 spreading by means of numerous suckers, with slender 

 prickles and usually numerous bristles: Ifts. 5-7, 

 resembling those of the former, but narrower, thinner, 

 not shining, usu- 

 ally pubescent 



beneath: fls. often 

 solitary; outer 

 sepals lobed. June. 

 Maine to Ga., 

 west to Wis. and 

 Okla. W.R. 64. 

 Much resembling 

 the preceding, 

 which is often con- 

 sidered' a variety 

 of this species. 

 Var. vffldsa, Rehd. 

 (R. humilis var. 

 rt#osa,Best). Lvs. 

 villous-pubescent beneath, thickish. Var. grandifldra, 

 Rehd. (R. humilis var. grandifldra, Baker). Fls. 2 in. 

 across: Ifts. larger. W.R. 66. Var. trfloba, Rehd. (R. 

 humilis var. triloba, Wats.). Fig. 3444. Petals 3-lobed. 

 G.F. 2:77 (adapted in Fig. 3444). 



31. nitida, Willd. Low upright shrub, 1% ft. high: 

 branches covered with straight prickles and numerous 

 bristles: Ifts. 7-9, narrowly oblong, acute at both ends, 

 bright green and shining above, glabrous, J^-l in. long: 

 fls. usually solitary, 1-2 in. across, on slender glandular- 

 hispid pedicels; sepals entire. June, July. Newfound- 

 land to Mass. B.B. (ed. 2) 2:285. 



32. foliolosa, Xutt. Fig. 3445. Low shrub, 1H ft. 

 high: sts. with rather few slender prickles, sometimes 

 almost unarmed: Ifts. 7-9, narrow or linear-oblong, 

 bright green and shining above, glabrous or pubescent 

 on the midrib beneath, j^j-1 in. long: fls. solitary or few, 

 pink, about 1^ in. across; pedicels and receptacle 

 smooth or sparingly glandular-hispid: fr. globose, with 

 rather few achenes. Maj', June. Ark. and Okla. to Texas. 

 G.F. 3: 101 (adapted in~Fig. 3445). Like the preceding, 

 a handsome dwarf shrub with graceful foliage. 



Section 8. CIXXAMOMILE. Many American, Asiatic, 

 and European species. Erect shrubs, with usually 

 straight prickles, in pairs or scattered, and often with 

 numerous bristles: Ifts. 5-11: corymbs usually many-fld., 

 with dilated bracts; sepals generally entire, upright 

 after flowering, and persistent, rarely deciduous: 

 receptacle usually smooth. 



A. Branches and prickles tomentose 33. mgosa 



AA. Branches and prickles glabrous. 



B. Stipules, at least on the shoots, more 



or less convolute 34. cinnamomea 



BB. Stipules flat. 



c. Prickles nearly always wanting 



(sometimes present in _V0. 37). 

 D. Lfts. simply serrate, 5-7. 



E. Rachis of If. puberulous: fls. 



single 35. blanda 



EE. Rachis of If. glabrous: fls. 



double 36. Lheritierana 



DD. Lfts. doubly serrate, 7-9: fr. 



oblong to ovoid 37. pendulina 



CC. Prickles present. 



D. Lfts. 3-7, only on shoots occa- 

 sionally 9: calyx persistent. 

 E. Upper stipules enlarged. 

 F. Fls. usually several, 1-2 

 in. across: Ifts. generally 

 obovate, M-lty in. long. . 38. Woodsii 

 FF. Fls. usually solitary, about 

 8 in. across or more: Ifts. 

 1-2 in. long. 



