A very common, scrubby, branching bramble with long, grooved, erect or curving stalks growing from three to ten feet in length, and armed with stout, slightly recurving thorns. The stiff, prickly purplish or brown stalks of the past year are easily distinguished from the new, green shoots. From three to five pointed, oblong leaflets compose the compound leaf. They are unequally toothed, strongly ribbed and their surface is hairy. The five light green sepals alternate between the large, narrow, white petals and the numerous, slender, brown-tipped stamens are prettily clustered around the little group of green pistils in the centre. The flowers are borne in loose, terminal clusters. The juicy, thimble-shaped fruit ripens in hanging groups during July and August. This is the original of the ordinary form of the cultivated or garden variety of blackberry, now extensively raised for marketing. For over a hundred years it was erroneously known as Rubus canadensis. It prefers dry soil in open, sunny places, in low altitudes, from Nova Scotia to Ontario and North Carolina. A white-fruited variety occurs in Michigan.