142 ROSE FAMILY 



is perfectly hardy and sometimes persists for some time without cultivation 

 and spreads by suckers. 



Rosa rugosa T h u n b e r g 1784 



Shrubs 6 dm. to 2 m. high; stems stout, grayish brown or black. 

 pubescent, armed with many crowded bristles and strong pubescent needle* 

 like prickles; infrastipular prickles not obvious; leaves with 5-9 leaflets, 

 leaflets elliptical or ovate-lanceolate, finely blunt-serrate or crenate to the 

 base, thick and firm, rugose, glossy and dark green above, paler and soft 

 pubescent beneath, tip rounded or pointed, base cordate or rounded, upper 

 leaflets 2.5-4 cm. long, 1.5-2.75 cm. wide, lower ones somewhat smaller, 

 petioles soft pubescent and prickly, stipules dilated, finely crenate, the 

 pair often 15 mm. wide; flowers in small clusters borne on all. the shoots 

 throughout the season, pedicels pubescent or prickly, receptacle smooth. 

 sepals pubescent, pointed, usually simple, 1.5-2 cm. long, petals deep rose 

 or white, flower 6-8 cm. across; sepals persistent in fruit, hip globular, 

 scarlet, 2 cm. or more in diameter : rugosa, rugose, referring to the 

 leaves. 



A very variable rose, native of Japan, Siberia and eastern Europe. 

 The forms from Russia and Siberia are perfectly hardy in Minnesota 

 without protection in winter. It is much planted in shrubberies and 

 hedges and is valuable on account of its fine foliage, large flowers borne 

 throughout the summer, and handsome scarlet fruit. Double flowered 

 forms are in cultivation and also several hybrids of this species with va- 

 rious garden roses. They are not all as hardy as the original species. 



Rosa rubiginosa L i n 11 e 1771 Sweetbrier 



Shrub 6 dm. to 2 m. high, stems greenish or brown, armed with stout 

 hooked infrastipular prickles, 6-12 mm. long, often also with similar 

 scattering prickles; leaves with 5-7 leaflets, fragrant; leaflets broadly 

 elliptical or obovate, sharply doubly serrate almost to the base, bright 

 green, finely pubescent on the upper side, slightly pale and densely 

 glandular pubescent below, tip broadly wedge-shaped or rounded, base 

 usually rounded, upper leaflets 1-2 cm. long, 8 mm.- 1.8 cm. wide, lower 

 about one-half as large, rachis and petiole soft pubescent, glandular and 

 prickly, stipules widely dilated, veiny, glandular along the margin and 

 on the under side; flowering shoots borne on the old wood, flowers soli 

 tary or in few-flowered clusters mostly with leafy bracts, pedicels and 

 often receptacles prickly and glandular, sepals 1.5-2 cm. long, very glan- 



