Plants are used as a source of medicine due to presence of certain chemicals/active ingredients in side of their body. Presence, concentration and types of the chemicals are performing to be usefulness of the various plants in the treatment of certain disorders.

Dioscorides

Herbal medicine (also herbalism) is the study of pharmacognosy and the use of medicinal plants, which are a basis of traditional medicine.

Angiosperms (flowering plants) were the original source of most plant medicines. Human settlements are often surrounded by weeds used as herbal medicines, such as nettle, dandelion and chickweed.

drugs, at least 118 are based on natural sources: 74 percent come from plants, 18 percent from fungi, 5 percent from bacteria, and 3 percent from vertebrate species such as snakes or frogs (Ecology Society of America, 1997).

Drugs of plant, animal, microbiological, marine, mineral, geographical origins constitute the natural sources. The entire plant, plant parts, secretion, and exudate of plants are the sources of plant drugs.

Plants That Aid in the Wound Healing Process

• Yarrow. As the University of Maryland Medical Center pointed out, yarrow, a flower similar to chrysanthemums, has been used as a medicinal treatment since the time of the ancient Greeks.
• Goldenrod.
• Calendula.

Snake Plant a.k.a. Mother-In-Law’s Tongue Considered highly efficient in oxygen production, the Snake Plant otherwise known as the Mother-In-Law’s Tongue, is unique for its nighttime oxygen production, and ability to purify air through the removal of benzene, formaldehyde, trichloroethylene, xylene and toluene.