Rosa spinosissima L.

Rosa spinosissima L. Sp. PI. 49 1". 1753
Rosa cinnamomea L. Syst. Nat. ed. 10. 1062. 1759. Not R. cinnamomea L. 1753.
Stem slender, 1-2 m. high, brown, terete, armed with short curved prickles; floral branches 1-2 dm. long, often unarmed; stipules dilated, more or less convolute, about 2 cm. long, dentate on the margins, finely puberulent; rachis and petiole tomentulose; leaflets 5 or 7, rarely 3, elliptic, simply serrate, dull-green, sparingly puberulent above, densely-pubescent beneath, 1.5-4 cm. long; flowers solitary or few together; pedicels 2-3 cm. long, glabrous; hypanthium globose, glabrous, in fruit 12-15 mm. thick, scarlet; petals dark rose-colored, 2-2.5 cm. long, obcordate; sepals lanceolate, attenuate, 2 cm. long, glabrous on the back, tomentose on the margins, in fruit erect and persistent; styles distinct, persistent, not exserted; achenes inserted both in the bottom and on the sides of the hypanthium.
Type locality: Europe.
Distribution: Europe and northern Asia; cultivated and occasionally escaped in the eastern states and Wisconsin.