Rubus allegheniensis (Blackberry)
Also called Appalachian raspberry and dewberry. Considered one of the best traditional remedies for summer complaints. The most astringent part is the root bark. Orally, they are used to treat sore throats, mouth ulcers and gum inflammations.
A decoction of the leaves is useful as a gargle in treating thrush.
In addition to the root bark, the leaves are depurative, diuretic, tonic and vulnerary, and make an excellent alternative medicine for dysentery and hemorrhoids.
Blackberry juice is also commonly used to treat diarrhea and flux.