Tuesday, April 25, 2023

Rubus species (Blackberries, Raspberries, Dewberries)

In New Jersey we have:

Wineberry (R. phoenicolasias): fuzzy red stems

Black raspberry (R. occidentalis): blue-white, round stems 

(Red raspberry) (R. idaeus) (mostly north of NJ): blue-green, round stems 


Cut-leaved blackberry (R. laciniatus): deeply lobed leaflets

Sand blackberry (R. cuneatus): wedge-shaped, smallish leaflets

Purple flowering raspberry (R. odoratus): leaves not divided, currant or maple-like


Common dewberry (R. flagellaris): trailing with prickles on stems, dull leaves

Swamp dewberry (R. hispidus): trailing with bristles and some prickles on stems, shiny leaves


Common blackberry (R. allegheniensis): fluted stems, flowers in clusters of more than 12, glandular flowerstalks

Pennsylvania blackberry (R. pensylvanicus): fluted stems, flowers in clusters of fewer than 12, not very glandular. 


Tough to separate the last two. 


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