76 Rydberg: Notes on Rosaceae 



Abrams &" MacGregor 135; Goose Lake, Mrs. Austin 455; "Cali- 

 fornia," Kuntze 3205; Berry Caiion, 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 4Q14. 



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, i-i .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 I-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 i 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, 

 1-1.5 cm. long and nearly as broad, finely pubertflent on both 



