The sources of staple food for man are plants that belong to the family:

Explanation

Poaceae, commonly known as the grass family, is one of the largest and most economically important families of flowering plants. The Poaceae family includes a wide variety of grasses, ranging from small, herbaceous plants to large, woody bamboos. Many grasses in the Poaceae family are of great economic importance for humans and animals. They are used as staple food crops, for forage, as ornamental plants, and for the production of materials such as paper and thatch. This family includes major cereal crops that serve as staples worldwide, such as rice (Oryza sativa), wheat (Triticum aestivum), maize (corn, Zea mays), barley (Hordeum vulgare), and oats (Avena sativa).