Dog Rose

Rosa canina L. Sp. PI. 491. 1753
Rosa flexnosa Raf. Prec. Dec. 35. 1814.
Rosa Rafinesquiana Tratt. Ros. Monog. 2: 234. 1823.
Stems branched, upright, terete, 2-3 m. high, armed with uniform, stout, curved, flattened prickles 5-10 mm. long; leaves 5-7-foliolate; stipules adnate, mostly dilated, 2-3 cm. long, mostly glabrous beneath, glandular-dentate on the margins; petiole and rachis often glandularhispid, otherwise glabrous; leaflets 1-4 cm. long, oval or ovate, acute at the apex, glabrous on both sides, shining above, not at all glandular beneath except rarely so on the midrib, sharply serrate, occasionally with double teeth; flowers 1-3 together; pedicels glabrous. 1-3 cm. long; hypanthium ellipsoid, acute at both ends, glabrous, in fruit orange, red or scarlet, 10-15 mm. thick, 15-20 mm. long; sepals lanceolate, caudate-attenuate, 15-20 mm. long, glabrous on the back, tomentose within, entire or with linear lobes, in fruit reflexed and deciduous; petals about 2 cm. long, pink, obcordate; styles distinct, hairy, persistent, at last slightly exserted; achenes inserted both in the bottom and on the sides of the receptacle.
Type locality: Europe.
Distribution: Roadsides, from Massachusetts to District of Columbia and Tennessee; naturalized from Europe.