Betula lentaUsed internally and externally as an emollient for hardened, dry, mineralized skin. The bark is high in potassium, helping the body to retain water. Useful for acne, eczema, psoriasis, cuts, and burns. Wonderful for hair rinses for thin lifeless hair or those with dry flaky scalp. Infused oil can be used for tight stiff muscles and joints or for sprains and strains.