Distribution: About 651 genera and about 10,000 spp.; of cosmopolitan distribution, but most abundant in tropical and north-temperate regions with seasonal rainfall, where they form extensive grasslands.
Panicum(400) and Poa(300) are some of the largest genera.
The most important family of plants to human society; includes wheat(Triticum), rice(Oryza), maize or corn(Zea), and sugar cane(Saccharum).