GENUS 30. 



ROSE FAMILY. 



283 



i. Rosa setigera Michx. Prairie Rose. Climb- 

 ing Rose. Fig. 2307. 



Rosa setigera Michx. Fl. Bor. Am. i : 295. 1803. 



Stems climbing, several feet long, armed with 

 scattered curved prickles but not bristly, or unarmed. 

 Petioles, twigs and peduncles often glandular-pubes- 

 cent ; stipules very narrow ; leaflets 3, or sometimes 5, 

 mostly ovate, acute or obtusish at the apex, rounded 

 at the base, i'-3' long, sharply serrate; flowers 

 corymbose, about 2!' broad; calyx-lobes ovate, acute, 

 at length reflexed and deciduous, glandular; petals 

 obcordate, varying from rose-color to white ; styles 

 cohering in a glabrous column ; fruit globose, 4"-$" 

 in diameter, more or less glandular. 



In thickets and on prairies, southern Ontario to Wis- 

 consin, West Virginia, Florida and Texas. Escaped 

 from cultivation in Connecticut, New Jersey and Vir- 

 ginia. June-July. Michigan rose. Rose-blush. 



2. Rosa blanda Ait. Smooth or Meadow 

 Rose. Fig. 2308. 



Rosa blanda Ait. Hort. Kew. 2: 202. 1789. 



Erect, low, 2-4 high ; entirely unarmed 

 or with a few straight slender prickles on the 

 stem. Stipules rather broad; leaflets 5-7, 

 short-stalked, usually pale beneath, oval or 

 obovate, obtuse at the apex, commonly nar- 

 rowed or cuneate at the base, i'-ii' long, 

 simply and sharply serrate ; flowers pink, some- 

 times 3' broad, corymbose or solitary; calyx- 

 lobes lanceolate, acuminate, entire, hispid- 

 pubescent, persistent and erect on the fruit; 

 petals obovate, erose or sometimes obcordate ; 

 styles separate; fruit globose or pyriform, 

 glabrous or nearly so, about 5" in diameter. 



In moist rocky places, Newfoundland to Ver- 

 mont and northern New Jersey, west to Ontario, 

 Assiniboia and Missouri. Pale or early wild-rose. 

 June-July. 



3. Rosa acicularis Lindl. Prickly Rose. 

 Fig. 2309. 



Rosa acicularis Lindl. Ros. Monog. 44. pi. 8. 1820. 

 Rosa Sayi Schwein. in Keating, Narr. Long's Exp. 2 : 



388. 1824. 

 R. Engelmanni S. Wats. Card. & For. 2: 376. 1889. 



Bushy, low, i-4 high, the stems and often 

 the branches, densely armed with straight prickles ; 

 infrastipular spines none. Stipules mostly broad; 

 leaflets 5-9 (rarely 3), oval or oval-lanceolate, 

 obtuse at the apex, rounded at the base, simply 

 or doubly serrate, often more or less resinous- 

 pubescent, i '-2' long; flowers usually solitary, 

 2-J'-3' broad; calyx-lobes lanceolate, acuminate or 

 sometimes dilated above, entire or few-toothed, 

 persistent and erect upon the fruit; styles distinct ; 

 fruit globose or ovoid, sometimes i' long, gen- 

 erally glabrous. 



Anticosti to Ontario, Alaska, northern Michigan, 

 Minnesota, south in the Rocky Mountains to Colo- 

 rado. Northern Europe and Asia. Consists of sev- 

 eral races, differing in the form of the fruit and in 

 rhe amount of pubescence. June-July. 



