^ Valduga, Eunice; de Freitas, Renato João Sossela; Reissmann, Carlos B.; Nakashima, Tomoe (1997). "Caracterização química da folha de Ilex paraguariensis St. Hil. (erva-mate) e de outras espécies utilizadas na adulteração do mate". Boletim do Centro de Pesquisa de Processamento de Alimentos (in Portuguese). 15 (1): 25–36. doi:10.5380/cep.v15i1.14033. Archived from the original on 2014-08-26.
​Next on our list of herbs is Echinacea also known as Black Sampson it is referred to by the native Americans of the plains as snake root, because it was traditionally used to treat snake bites. Natives have also used the plant to treat tooth aches. The Omaha-Ponca and Cheyenne Indians were probably the most notable groups to use the plant. They would rub the juices of the roots on their bodies to heal burns, or like mentioned above would use it to treat toothaches. Today echinacea is used to boost the immune system and speed up recovery of the common cold. There are three common types of Echinacea; Echinacea purpurea is the most common it can be found from Georgia to Oklahoma, north to Michigan and east to Ohio. Echinacea pallida is most commonly found in open woods and prairies, people in states like Michigan, Arkansas, Texas and here in Nebraska can find this species of Echinacea. Echinacea angustifolia tends to grow on roadsides, prairies, and outcrops; people living in Texas all the way north through the Dakotas and southern Saskatchewan you can also expect to find it growing in Montana and Colorado.
In Europe, apothecaries stocked herbal ingredients for their medicines. In the Latin names for plants created by Linnaeus, the word officinalis indicates that a plant was used in this way. For example, the marsh mallow has the classification Althaea officinalis, as it was traditionally used as an emollient to soothe ulcers.[4] Ayurvedic medicine, herbal medicine and traditional Chinese medicine are other examples of medical practices that incorporate medical uses of plants. Pharmacognosy is the branch of modern medicine about medicines from plant sources. Plants included here are those that have been or are being used medicinally, in at least one such medicinal tradition.
​Comfrey's use dates back centuries to at least the time of the ancient Greeks. During the Middle Ages comfrey was a widely cultivated herb found extensively in the gardens of monasteries. Throughout the 1700's and 1800's comfrey was also a popular herb grown in many gardens across Europe as well as America. Sometime during the late 1970's however research revealed that comfrey when taken internally can cause severe liver damage so it has lost popularity and internal use is even banned in many countries. Applications in the from of ointments, poultices, or creams are still considered safe though. Comfrey can still be found growing wild in central Europe, and the eastern United States as well as  a few western states.
Eating a clove or two of fresh garlic a day may indeed keep the doctor away, in part because it has immune-boosting, antibacterial, antiviral, and anti-fungal effects. Many of garlic's therapeutic effects are derived from its sulfur-containing compounds, such as allicin, which are also what give it its characteristic smell. In general, garlic's benefits fall into four main categories: