230 



ROSACEAE. 



[VOL. II. 



3. Rosa acicularis Lindl. Prickly Rose. (Fig. 1967.) 



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

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



a: 388. 1824. 

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



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

 the branches, densely armed with straight 

 prickles; iufrastipular 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'-i' long; flowers 

 usually solitary, 2 #'-3' broad; sepals lanceo- 

 late, acuminate or sometimes dilated above, en- 

 tire or few-toothed, hispid or glabrous, persist- 

 ent and erect upon the fruit; styles distinct; 

 fruit globose or ovoid, sometimes i' long, 

 generally glabrous. 



Anticosti to Ontario, northern Michigan, Minne- 

 sota and the Northwest Territory, south in the 

 Rocky Mountains to Colorado. We follow Dr. 

 G. N. Best in the reduction of R. Sayi and R. l-'.n- 

 gelmanni to this species, which occurs also in 

 northern Europe and Asia. June-July. 



4. Rosa Arkansana Porter. Arkansas Rose. 

 (Fig. 1968.) 



Rosa Arkansana Porter, Syn. Fl. Colo. 38. 1874. 



Rosa blanda var. Arkansana Best, Bull. Torr. Club, 17: 



145- "890. 



Erect, low, i-2 high. Stems densely prickly with 

 very slender bristles; infrastipular spines none; stipules 

 rather narrow, sometimes toothed above; leaflets 7-11, 

 oval or obovate, sessile or nearly so, obtuse at the apex, 

 narrowed or often cuneate at the base, seldom over i' 

 long, simply and sharply serrate, glabrous on both 

 sides; flowers corymbose or rarely solitary, about 2' 

 broad; sepals lanceolate, acuminate, sparingly glandu- 

 lar-hispid or glabrous, or sometimes lobed, persistent 

 and spreading or reflexed; styles distinct; fruit globose 

 or nearly so, 4"-6" in diameter, glabrous. 



Prairies, Minnesota and Iowa to Nebraska, Colorado, 

 Texas and New Mexico. June-July. 



\ 



5. Rosa Woddsii Lindl. Woods' Rose. 

 (Fig. 1969.) 



Rosa Woodsii Lindl. Mon. Ros. 21. 1820. 



Rosa Fendleri Crepin, Bull. Soc. Bot. Belg. 15: 91. 1876. 



Low, bushy, i-3 high, armed with slender 

 mostly straight spines, or naked above. Infrastip- 

 ular spines commonly present; stipules rather broad, 

 entire; leaflets 5-9, oval or obovate, short-stalked or 

 sessile, obtusish at the apex, narrowed or cuneate at 

 the base, 5 // -i8 // long, simply and sharply serrate, 

 somewhat glaucous beneath; flowers i / -2 / broad, 

 corymbose or solitary, short-pedicelled; sepals lan- 

 ceolate, acuminate, laterally lobed or entire, erect 

 and persistent on the fruit; styles distinct; fruit glo- 

 bose or globose-ovoid, 4 // -5 // in diameter, glabrous, 

 sometimes glaucous. 



Prairies, Minnesota to Missouri, the Northwest Terri- 

 tory, New Mexico and Colorado. June-July. 



