background of dry grass horsetail. equiseti arvensis herba is widely used in folk medicine

horsetail plant background nature grass ecology medicine potion grinding alkaloid tannins neous scent ascorbic saponins white acid stems flora branches witchcraft fragrance drink dried magic leaves broth isolated field texture prehistoric nicotine fern branch weed drug stem herbal ancient wild equisetum primordial chopped equisetaceae remedies officinal arvense dry horsetail equiseti arvensis herba used folk