230 ROSACEAE. (Vor. II. 
3- Rosa acicularis Lindl. Prickly Rose. (Fig. 1967.) 
Rosa acicularis Lindl. Ros. Monog. 44. pl. 8. 1820. 
Rosa Sayi Schwein. in Keating, Narr. Long’s Exp. 
2: 388. 1824. 
R. aclanAnE S. Wats. Gard. & For. 2: 376. 1889. 
Bushy, low, 1°-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, 1/-2’ long; flowers 
usually solitary, 244’-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 1’ 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 &. Sayi and R. En- 
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. 1890. 
Erect, low, 1°-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 1’ 
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 Woodsti Lindl. Mon. Ros. 21. 1820. 
Rosa Fendleri Crepin, Bull. Soc. Bot. Belg. 15: 91. 1876. 
Low, bushy, 1°-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’’-18’’ long, simply and sharply serrate, 
somewhat glaucous beneath; flowers 1/-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. 
