522 NORTH AMERICAN FLORA [VOLUME 22 
lanceolate, caudate-attenuate, about 1.5 cm. long, more or less tomentose on both sides; petals 
rose-colored, obcordate, 2 cm. long; styles distinct, persistent, not exserted; achenes inserted in 
the bottom and on the sides of the hypanthium. 
Type collected near Upland, San Bernardino County, California, July 4 and August 25, 1918, 
J. M. Johnston 2050 (in flower) and 2130 (in fruit; both in herb. N. Y. Bot. Gard.). 
97. Rosa myriantha Carr. Rev. Hortic. 1865: 448. 1865. 
Rosa californica glabra Crépin, Bull. Soc. Bot. Belg. 15:52. 1876. 
Rosa californica Regel, Acta Hort. Petrop. 5: 363. 1877. Not R. californica Cham. & Schlecht. 
1827. 
Stem 1 m. high, much branched, with reddish, shining bark, armed with straight, stout 
prickles 6-10 mm. long. more or less flattened; floral branches 1-4 dm. long, more or less 
armed; stipules adnate, 1—-1.5 cm. long, more or less dilated, sparingly pilose or glabrate on 
the back, sparingly glandular-toothed; leaflets usually 5, broadly oval or sometimes obovate, 
rounded at both ends, coarsely dentate, glabrous and green above, sparingly pilose or glabrate 
and glaucescent beneath, 2—4 cm. long; flowers corymbose; pedicels glabrous, 1-2 cm. long; 
hypanthium glabrous, in fruit red, depressed globose, 10-12 mm. in diameter; sepals lanceolate, 
caudate-attenuate, 15-20 mm. long, glabrous on the back, tomentose on the margins and 
within; petals obcordate, about 2 cm. long; styles distinct, persistent, not exserted; achenes 
inserted both in the bottom and on the sides of the hypanthium. 
TYPE LOCALITY: Described from cultivated specimens, introduced from California. 
DISTRIBUTION: Oregon and California. 
98. Rosa Davyi Rydb. Bull. Torrey Club 44: 76. 1917. 
Stem stout, glabrous, armed with numerous stout prickles, flattened below, 5—10 mm. long; 
leaves 5—7-foliolate; stipules broad, 1-1.5 cm. long, glandular-dentate on the margin, densely 
villous, the free portion lanceolate to ovate; rachis and petiole villous and sometimes glandu- 
lar-hispid, usually with a few prickles; leaflets broadly oval, 1-2.5 cm. long, rather firm, 
rounded at both ends, coarsely and simply serrate, short-pilose above, villous beneath; flowers 
2 or 3 together or solitary; pedicels 1-2 cm. long; hypanthium globose, glabrous, in fruit 15 
mm. in diameter, purple; sepals lanceolate, caudate-acuminate, 15 mm. long or more, villous 
on the back, tomentose within; erect and persistent in fruit; petals about 2 em. long, ob- 
cordate; styles persistent, distinct, not exserted. 
TYPE LOCALITY: Saratoga, Santa Clara County, California. 
DISTRIBUTION: California. 
99. Rosa rotundata Rydb. Bull. Torrey Club 44: 76. 1917. 
A stout shrub, more than 5 dm. high; new canes copiously armed with slender, straight, 
almost terete prickles 5-10 mm. long; branches red or purplish, with smaller infrastipular 
and scattered prickles; leaves mostly 5-—7-foliolate; stipules large, lance-ovate, puberulent 
on both sides, conspicuously glandular-denticulate, 1-1.5 cm. long; leaflets rounded, oval or 
suborbicular, 1-1.5 em. long and nearly as broad, finely puberulent on both sides, coarsely 
crenate-serrate with broad teeth; flowers corymbose; hypanthium round-ellipsoid or globose, 
with a short neck; sepals ovate, caudate-acuminate, about 8 mm. long, villous within and on 
the margins; petals 8-10 mm. long. 
TYPE LOCALITY: Mountains west of Franktown, Nevada. 
DISTRIBUTION: Known only from the type locality. 
100. Rosa pisocarpa A. Gray, Proc. Am. Acad. 8: 382. 1872. 
Rosa nutkana (?) microcarpa Crépin, Bull. Soc. Bot. Belg. 15:45. 1876. 
Stem 1-2 m. high, slender, with dark, chestnut-brown bark, armed with small weak 
infrastipular prickles, which are terete, 2-5 mm. long, usually ascending; floral branches 1—2 
dm. long, armed or unarmed; stipules adnate, the lower narrow, the upper dilated, densely and 
finely pubescent on the back, slightly glandular-dentate, the free portion semilunar, acuminate; 
