Allegheny blackberry

The Cherokee used the berries for making juice and of course ate them raw or cooked with other foods.They also used the roots to treat treat diarrhea and rheumatism. A similar infusion was used as an external wash to treat piles (eg., hemorrhoids). It was combined with honey to prepare a wash for sore throats, and a decoction of leaves was prepared to regulate urination (Hamel and Chiltoskey 1975). A similar preparation was used as a stimulating drink.
http://www.texasbeyondhistory.net/coast/nature/images/blackberry.html

Two ways to tell blackberries from dewberries...
1)blackberries grow higher than dewberries.
2)both stems have thorns but the dewberries have fuzz to the stems with the thorns as well.

http://thepapershell.com/blackberries-or-dewberries/