Allegheny Blackberry (Rubus allegheniensis) Porter, 1896

 

Synonyms: Rubus villosus var. montanus, Rubus acadiensis, Rubus alumnus, Rubus apianus, Rubus glandicaulis (see Flora of North America online for more synonyms ), common blackberry

 

 

Rubus allegheniensis is native to eastern and central North America (from the Great Lakes and Nova Scotia south to the Gulf of Mexico and Florida); introduced on the West Coast (British Columbia and California). Allegheny Blackberry grows in dry and moist soils at forest edges and gaps, in woodlands, savannas, meadows, and hedges; 0-1,600 m. Shade intolerant; benefits from fires, blowdowns, and logging; often forms dense thickets. Shrub, 1-3 m in height; stems are arching, armed with prickles. Leaves are deciduous, alternate, palmately compound; leaflets ovate to lanceolate, with serrate margins; abaxial surfaces armed with prickles on the mid-vein. Flowers arranged in terminal racemes (15-25 per inflorescence); 5 white petals. Fruits are black or dark violet, globose, with 20-100 drupelets. R. allegheniensis flowers in May-July. Hybridizes with Rubus canadensis, R. flagellaris, R. pensilvanicus, and R. setosus.

 

		D45062 Allegheny Blackberry (Rubus allegheniensis) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
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