The Blackberry.
Rubus villosus, Willd. Sp. Pl. vol. ii. p. 1085. Pursh, Fl. Amer. vol. i. p. 346.—Icosandria Polygynia, Linn. Rosaceæ, Juss.
Pubescent, prickly, with angular twigs; the leaves ternate or quinate, with ovato-oblong, serrate, acuminate leaflets, downy on both sides; the calycine leaves short, acuminate; and a loose raceme of white flowers. The berry is black. This species grows abundantly in old fields and by fences.