(Rubus fruticous and spp.) A.K.A Bramble Berry, Dewberry. In the Middle East, mastication of the leaves has been a remedy for bleeding gums since the time of Jesus. A tonic made from the root of the Blackberry plant works effectively as an astringent and is mild enough to use for treating watery diarrhea in children. In Chinese herbal medicine, herbs are noted for either a Yin or Yang application. The fruit is believed to apply to the Yin principle; therefore, it is the female functions of the body that would be affected.