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| Grasses | |
|---|---|
 | |
| Flowering head of meadow foxtail Alopecurus pratensis | |
| Scientific classification | |
| Unrecognized taxon (fix): | Plantae |
| Order: | Poales |
| Clade: | Graminid clade |
| Family: | Poaceae John Hendley Barnhart |
| Type genus | |
| Poa | |
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.
A common kind of grass is used to cover the ground in places such as lawns and parks. Grass is usually the color green. That is because they are wind-pollinated rather than insect-pollinated, so they do not have to attract insects. Green is the best colour for photosynthesis.
Grasslands such as savannah and prairie where grasses are dominant cover 40.5% of the land area of the Earth, except Greenland and Antarctica.
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