Rubus allegheniensis var. allegheniensis

General:
Medium to tall shrub, 0.5-3 m tall; stems 5-15 mm in diameter, erect to ascending, with stout, flattened, straight prickles.

Leaves:
Alternate, deciduous, palmately compound; leaflets 5, oblong-egg-shaped, 7-20 cm long, finely saw-toothed and long-tapering to a sharp-pointed tip, the leaf-stalks soft-hairy, glandular and hooked-prickly.

Flowers:
Inflorescence of many stalked flowers in an open, long, raceme-like cluster, the stalks fine-woolly and glandular; corollas white, the petals 5, spreading, egg-shaped, 5-10 mm long; calyces woolly, 5-lobed, the lobes lanceolate, bent back; ovaries superior; stamens numerous.

Fruits:
Drupelets, coherent in a black oblong cluster that falls with the fleshy receptacle (a blackberry), the berries about 2 cm long.

Source:  The Illustrated Flora of British Columbia

Flower Colour:
White

Blooming Period:
Mid Spring

Fruit/Seed characteristics:
Colour: Black
Present over the Summer

Source:  The USDA