76 RYDBERG: NOTES ON ROSACEAE 
Abrams & MacGregor 135; Goose Lake, Mrs. Austin 455; ‘‘Cali- 
fornia,” Kuntze 3205; Berry Cafion, Heller & Brown 5546; 
Butte County, Mrs. Austin 1800; Colby 752; Sonoma County, 
Heller 5678; Little Chico, Mrs. Austin 1807; Round Valley, 
Chestnut 212; San Diego County, Abrams 3763; Laguna, Mearns 
36050; Schoenfeldt 3598; Dulzura & El Mido, Mearns 3879; Witch 
Creek, San Diego County, Abrams 4914. 
OrEGON: Barlow Gate, Lloyd; Lower Albina, Portland, Shel- 
don 10659; Wimmer, Hammond 119, in part. 
17. Rosa Davyi Rydberg, sp. nov. 
Stem stout, 5-10 m. long, glabrous, armed with numerous stout 
prickles flattened below; leaves five- to seven-foliolate; stipules 
broad, 1—-1.5 cm. long, glandular-dentate on the margin, densely vil- 
lous, free portion lanceolate to ovate; rachis and petiole villous and 
sometimes glandular-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 two or three 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 cm. long, obcordate; styles persistent, dis- 
tinct, not exserted. 
Rosa Davyi resembles R. californica in the leaf-form, but the 
prickles are long, straight and very numerous. It is a rare species. 
Greene collected a specimen without flower or fruit, which was 
nearly 7 m. high, at San Joaquin. The prickles are straight, flat, 
and nearly 1 cm. long. It evidently belongs here. 
CALIFORNIA: Saratoga, Davy 263 (type, in the herbarium of 
Columbia University); Mendocino, McMurphy 270. 
18. Rosa rotundata Rydberg, sp. nov. 
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 five- to seven-foliolate; stipules large, 
lance-ovate, puberulent on both sides, conspicuously glandular- 
denticulate, 1-1.5 cm. long; leaflets rounded, oval or suborbicular, 
I-1.5 cm. long and nearly as broad, finely puberulent on both 
