Grasses Temporal range: Albian–Present

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Flowering head of meadow foxtail Alopecurus pratensis Scientific classification e Kingdom: Plantae Clade: Tracheophytes Clade: Angiosperms Clade: Monocots Clade: Commelinids Order: Poales Clade: Graminid clade Family: Poaceae John Hendley Barnhart[2] Type genus Poa L. Grass is a type of plant with narrow leaves growing from the base. Their appearance as a common plant was in the mid-Cretaceous period. There are 12,000 species now.[3]