Pennsylvania blackberry
Rubus pensilvanicus
Photo: Pennsylvania Blackberry
Britton & Brown
Botanical name: Rubus pensilvanicus
Common name: Pennsylvania blackberry
Group: dicot
Family: Rosaceae
Growth type: subshrub
Duration: perennial, deciduous
Origin: native
Plant height: 2-5’
Foliage: prickly bramble, leaves serrated on margins
Flower: white, 1” across with 5 white petals
Flowering time: late spring, early summer
Fruits: compound drupes up to 3/4", black at maturity
Habitat: often found in areas that have been disturbed; grows along openings and edges
Range in New Jersey: statewide
Heritage ranking, if any: n/a
Misc. One of several common blackberry species in southern NJ. This species is distinguished by its shrubby habit, the stems frequently overarching. The fruit are excellent. 

Pollinators, bees, butterflies, skippers, wasps, and many other kinds of insects frequent the flowers.  Mammals, birds, reptiles, and insects browse berries as well. Fruits are large black aggregates; when ripe they are used in jams and jellies.
Credit: USDA United States Dept. of Agriculture, Natural Resources Conservation Service data base