Rubus setosus Bigelow - Bristly Blackberry


 

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Rubus setosus - (image 1 of 5)

 

Taxonomy

Family: Rosaceae

Habitat

Fields, roadsides, moist thickets, woodland borders, edges of swamps and marshes.

Associates

 

 Distribution

Quebec west to WI, south to VA and IL.

Morphology

 

Woody perennial to 1 m or less; primocanes erect, ascending, or arching, some of them sometimes trailing, not rooting at the tips, beset with slender bristles that are mostly slender to the base, typically reflexed and often glandular when young; primocane leaves 3-5-foliate; leaflets acute to acuminate, deciduous, usually glabrous but sometimes hairy or pubescent beneath. Flowers few to many in a broad racemiform or corybiform inflorescence; pedicels usually glandular; fruit a cluster of drupelets remaining attached to the receptacle, black at maturity, sour.

Notes

Flowers June to August

Wetland indicator: FACW

This species (or complex) may hybridize with R. allegheniensis and R. hispidus and tends to exhibit intermediate characteristics of the two species. Plants with fewer bristles interspersed with some small-based prickles have been called R. vermontanus Blanch.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

 

New England Wildflower Society. Go Botany: Rubus setosus. Accessed 3 Aug, 2014. https://gobotany.newenglandwild.org/species/rubus/setosus/

 


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 Michael Hough © 2014