Botanical Overview
Commonly known as Corn, this species belongs to the Poaceae family. This well-documented medicinal plant appears in the pharmacopoeias of numerous traditional systems, valued for its broad therapeutic range. The grass family (Poaceae) includes annual and perennial herbs with hollow, jointed stems and narrow leaves with parallel venation. The flowers are reduced and arranged in spikelets, and the fruits are grains (caryopses). This family provides the majority of the world’s food calories through cereals.
General Description
The leafy stalk of the plant gives rise to male inflorescences or tassels which produce pollen, and female inflorescences called ears. The ears yield grain, known as kernels or seeds. In modern commercial varieties, these are usually yellow or white; other varieties can be of many colors. Maize was domesticated by indigenous peoples in southern Mexico about 9,000 years ago from wild teosinte. Native Americans planted it alongside beans and squashes in the Three Sisters polyculture. That is, those three vegetables were the main staple crops of the time.
Family Context
The Poaceae family is very large and globally distributed. Notable medicinal members include:
- Adlay — 54 documented uses
- Rice — 47 documented uses
- West Indian Lemongrass — 43 documented uses
- Wheat — 43 documented uses
Geographic Distribution
Corn has been recorded in 10 countries and territories worldwide, including Afghanistan, Argentina, Brazil, Spain, France, and others.
Traditional Uses
Corn has been traditionally used for digestive health, urinary tract health, and pain and inflammation, among other applications.
Digestive health.
- Stomachic
For digestive complaints, the herb is typically prepared as a tea or decoction taken before meals. The bitter compounds stimulate digestive secretions and improve nutrient absorption. Some traditions use the powdered root or leaves in small doses as a stomachic tonic.
Urinary tract health.
- Diuretic
- Cystitis
Urinary tract applications typically involve drinking the herb as a mild tea, which increases urine production and helps flush the urinary system. It may be combined with other demulcent herbs to soothe irritated tissues.
Pain and inflammation.
- Anodyne
- Gout
For pain and inflammation, preparations are applied both topically as compresses and taken internally. A warm poultice draws blood to the area and promotes healing, while internal preparations address systemic inflammation.
Active Compounds
Phytochemical research has identified 30 compounds in this species, including a diverse array of phytochemical classes (see the Complete Chemical Inventory below for the full list).
The identified compounds include the following categories:
- Flavonoid: antioxidant compounds that protect cells from oxidative damage
- Sterol: cholesterol-like compounds with anti-inflammatory properties
- Alkaloid: nitrogenous compounds with diverse pharmacological activities