Plants that have medicinal properties include echinacea, yarrow, black cohosh and galangal, according to the University of Rhode Island. Other medicinal plants are aloe vera, dong quai and bitter melon. More examples of medicinal plants include ephedra, swamp horsetail and water lotus, according to the New York Botanical Garden.
Echinacea, or purple coneflower, is well-known as a support for the immune system, according to the New York Botanical Garden. It also has antibacterial and antiviral properties and heals wounds and skin disorders such as acne, psoriasis and boils. It also eases infections of the upper respiratory tract and sexually transmitted diseases.
There are two types of ephedra, according to the New York Botanical Garden. One is the ephedra plant, and the other is joint fir. Ephedra supports the health of the kidneys and treats respiratory conditions such as asthma, sinusitis and hayfever. It also relieves the symptoms of allergies. Joint fir is a warming herb that stimulates the heart and the nervous system. It also dilates the bronchial tubes and treats edema and arthritis.
Black cohosh treats the symptoms of female issues, according to the University of Rhode Island. These include menopausal discomforts such as hot flashes and poor sleep.