Rosa spithamaea

Rosa spithamaea S. Wats. Bot. Calif. 2: 444. 1880
Stem from creeping rootstocks, glabrous, 1-3 dm. high, usually both bristly and with infrastipular prickles, sometimes unarmed; prickles straight, slender, 5-10 mm. long, terete; stipules adnate, narrow, 1 cm. long or less, puberulent and often glandular-pruinose on the back, glandular-ciliate on the margin; petiole and rachis more or less glandular; leaflets 3-7, usually 5, oval to nearly orbicular, double-serrate with gland-tipped teeth, 1-3.5 cm. long, petioluled, thin, sparingly pubescent or glabrate above, glandular-pruinose beneath; flowers corymbose or sometimes solitary; pedicels 1-2 cm. long, glandular-hispid; hypanthium ellipsoid or subglobose, densely glandular-hispid, in fruit 7-8 mm. thick; sepals lanceolate, caudateattenuate, 10-12 mm. long, densely glandular-hispid on the back, in age erect and persistent; petals about 15 mm. long; styles persistent, distinct, not exserted.
Type locality: Trinity River, California. Distribution: Oregon and California.