PAR? 6, 1918] ROSACEAE 505 
Rosa arkansanoides C. K. Schneid. Handb. Laubh. 2: 971. 1912. 
Rosa gratiosa dulcissima Lunell, Am. Midl. Nat. 3: 137. 1913. 
Rosa angustiarum Cockerell, Torreya 18: 180. 1918. 
Stem erect, 3-5 dm. high, rarely higher, from a rootstock or short caudex, usually simple, 
dying back to near the ground, densely bristly, green; stipules adnate, usually dilated, 1.5-2 
em. long, densely and finely pubescent, rarely somewhat glandular on the back, but glandular- 
dentate on the margins; leaflets usually 9 or 11, obovate, acute at the base, usually obtuse or 
rounded at the apex, 1.5—4 cm. long, light-green, finely and rather densely pubescent on both 
sides or in age glabrate above, densely serrate; rachis and petioles finely pubescent, rarely 
glandular or bristly; flowers corymbose at the end of the stem; pedicels 1—2 cm. long, glabrous; 
hypanthium globose, glabrous or rarely bristly, in fruit about 1 cm. broad; sepals lanceolate, 
caudate-attenuate, usually entire, 1-1.5 cm. long, tomentose within and on the margin, some- 
what glandular on the back, after anthesis ascending and usually persistent or tardily decidu- 
ous; styles distinct, persistent, not exserted; achenes inserted in the bottom and on the lower 
sides of the hypanthium. 
TYPE LOCALITY: Las Vegas, New Mexico. 
DISTRIBUTION: Illinois to western Texas, New Mexico, Alberta, and Manitoba; also collected 
in the District of Columbia. 
ILLUSTRATIONS: Willm. Gen. Rosa #l. opp. 315; Britt. & Brown, Ill. Fl. f. 1968 (as R. arkan- 
sanu); ed. 2. f. 2310 (as R. pratincola). 
42. Rosa alcea Greene, Leaflets 2: 63. 1910. 
Stem low, 1-3 dm. high, terete, densely bristly, even the floral branches; stipules adnate, 
1-1.5 cm. long, puberulent, and glandular-hispid and even bristly on the back, glandular- 
ciliate on the margins, rather broad, the free portion ovate, acute; rachis and petiole puberulent 
and glandular; leaflets 7—9, elliptic-obovate, rounded at the apex, cuneate at the base, 1—1.5 
em. (rarely 1.5—2 cm.) long, serrate, glabrous above, finely and densely pubescent and strongly 
veined beneath; flowers solitary or few together; bracts densely glandular, pedicels glabrous 
or sparsely glandular, 1-2 cm. long; hypanthium globose, usually glandular-bristly; sepals 
lanceolate, 15 mm. long, caudate-attenuate, glandular-hispid on the back; petals obcordate, 
15 mm. long; styles distinct, persistent, not exserted; achenes inserted both in the bottom and 
on the sides of the hypanthium. 
TYPE LOCALITY: Moose Jaw, Assiniboia [now Saskatchewan]. 
DISTRIBUTION: Saskatchewan, Manitoba, and North Dakota. 
43. Rosa conjuncta Rydberg, sp. nov. 
Stem erect, simple, about 5 dm. high, glabrous, densely bristly; stipules adnate, about 
2 cm. long, finely and densely pubescent, entire or denticulate, the free portion ovate, acute; 
rachis and petiole densely puberulent; leaflets mostly 9, oblanceolate or elliptical, acute, 
sharply serrate, short-petioluled, 2-5 cm. long, glabrous and glaucous above, densely puberulent 
beneath; flowers corymbose at the end of the stem; pedicels 1-3 cm. long, glabrous; hypanthium 
subglobose, acute at the base, glabrous, about 15 mm. thick in fruit; sepals lanceolate, caudate- 
acuminate, about 2 cm. long, usually some of them with linear lobes, glandular-hispid on the 
back, in fruit persistent but reflexed; styles distinct, persistent, not exserted; achenes inserted, 
both in the bottom and on the sides of the hypanthium. 
ee its collected in Atchison County, Missouri, August 23, 1893, Bush 101 (herb. Columbia 
niv.). 
DISTRIBUTION: Missouri. 
44. Rosa polyanthema Lunell, Am. Midl. Nat. 3: 138. 1913. 
Stem erect, 5-15 dm. high, covered with numerous slender prickles or bristles, otherwise 
glabrous, the branches from the upper axils usually soon overtopping the inflorescence; stipules 
adnate to the petioles, very narrow, entire, densely pubescent beneath, glandular on the mar- 
gins, the free portion lanceolate, short-villous and more or less glandular, often glandular- 
bristly; leaflets 7-11, mostly 9, oval or obovate, cuneate at the base, obtuse or acutish at 
the apex, 2.5-5 cm. long, serrate, glabrate or nearly so above, short-pubescent beneath; 
