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Poaceae
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Poaceae

plant family
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Also known as: Gramineae, grass family
Written by
Christopher S. Campbell
Professor of Plant Systematics, University of Maine, Orono. Coeditor of Grass Systematics and Evolution.
Christopher S. Campbell
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Formerly called:
Gramineae

Poaceae, grass family of monocotyledonous flowering plants, a division of the order Poales. The Poaceae are the world’s single most important source of food. They rank among the top five families of flowering plants in terms of the number of species, but they are clearly the most abundant and important family of the Earth’s flora. They grow on all continents, in desert to freshwater and marine habitats, and at all but the highest elevations. Plant communities dominated by grasses account for about 24 percent of the Earth’s vegetation.