Shrubby, erect and branched, perennial; new growth glandular-pubescent and somewhat bristly but not prickly, 3 to 5 feet high. Leaves simple, petioled, large, 5 to 10 inches broad, three to five-lobed, cordate at the base, pubescent, especially on the veins beneath, the lobes long pointed, the middle lobe usually longer than the others; flowers rather numerous in corymbose, terminal clusters, purple, 1 to 2 inches broad; calyx lobes tipped with long, slender appendages; petals five; fruit red when ripe, broad and thin, scarcely edible.
In rocky woods and thickets, Nova Scotia to Ontario and Michigan, south to Georgia and Tennessee. Flowering from June to August.
Memoir 15 N. Y. State Museum
Purple-Flowering Raspberry; Thimbleberry - Rubus odoratus
New York contains a large number of native raspberries and blackberries. The principal species of Raspberries are R. strigosus Michaux (red); R. neglect us Peck (purple), and R. occidentalis Linnaeus (Black Raspberry). The Blackberries are R. triflorus Richards (Dwarf Red Blackberry), R. canadensis Linnaeus (Northern Blackberry), R. allegheniensis Porter (Mountain Blackberry), R. argutus Link (Tall Blackberry), and also the Dewberries. See Britton and Brown's Illustrated Flora for complete descriptions.