170 DESCRIPTIONS OF THE SHUUBS 



KEY TO SOME POPULAE SINGLE ROSES 



* Stems more or less densely covered with both prickles and bristles ; 



sepals remaining on the large globular fruit. Erect shrubs with no 



tendency to climbing habit. (A.) 

 A. Tall, to 6 feet ; leaves with 5-9 rough thick shining oval blades ; 

 flowers about 3 inches broad, either white, pink, or purple ; fruit 

 (1 inch) brick-red with long more or less spreading sepals. Jap- 

 anese Rough-leaved Rose (249) — Rosa rugosa. 

 A. Low, bushy, 1-4 feet ; leaves with 3-9 often resinous blades ; 

 flowers solitary, about 2 inches broad, deep rose color; fruit 

 (1-1 inch) with long erect sepals. Prickly Rose — Rosa acicu- 

 laris. 



A. Low, 1-4 feet ; leaves with 7-11 small, 1 inch or less, smooth 

 not resinous blades; flowers clustered; fruit smooth (I inch), 

 with long spreading sepals. Arkansas Rose — Rosa arkans<^na. 



* Stems armed with stout recurved spines or prickles and without soft 



hairs (except possibly at base) ; sepals of the calyx spreading and 

 dropping off from the fruit. Straggling bushes with a slight ten- 

 dency to climbing habits. All are deciduous. (B.) 



B. Fruit oblong and nearly smooth (i-| inch long); leaf -blades 5-7, 

 coarsely serrate. (C.) 



C. Leaf-blades regularly once-serrate. Dog Rose (250) — Rosa 

 canina. 



C. Leaf -blades twice-serrate. Sweetbrier or Eglantine (251) 

 — Rosa rubiginosa. 



B. Fruit globular and bristly, about i inch long. (D.) 



D. Leaf-blades 5-9 (commonly 7), finely serrate. (E.) 



E. Leaf-blades elongated, thin. Swamp Rose (252) — Rosa 



Carolina, 



E. Leaf -blades thick, dark green and shining above; stems 



brownish red. Glossy Rose (253)— Rosa virginiana (R. 



lucida). 



D. Leaf-blades commonly 5 (rarely 7), coarsely serrate ; fruit 



with spreading and early deciduous sepals. Pasture Rose 



(254) — Rosa hiimilis. 



D. Leaf -blades 3 (rarely 5), hairy beneath ; flowers deep red fad- 

 ing to whitish ; plant often decidedly climbing. Prairie Rose 



(255) — Rosa setigera. 



B. Fruit globular; with erect persistent sepals, nearly | inch in 

 diameter, smooth or nearly so ; stems nearly free from prickles. 

 Early Wild Rose (256) — Rosa blanda. 



