Grass Systematics

The grass family, known scientifically as the Poaceae or Gramineae (both names are correct) is one of the four largest families of flowering plants with approximately 500 genera and 10,000 species.  Grasses range from tiny inconspicuous herbs less than 5 cm tall to the giant bamboos that grow to 40 m tall.  The family is undoubtedly the most important flowering plant family to humans, directly or indirectly providing more than 3/4 of our food as well as being a major producer of oxygen and a large component of environmental filtering processes due to the enormous geographic range, spatial coverage and biomass of grasses on earth.  Grasses are the greatest single source of wealth in the world.

Where the Grasses Fit Into the Tree of Life

Some examples from each subfamily

Related Groups

The Clades of Grasses

Morphology and Vegetative Characters

Fertile Characters

Thumbnail Sketches of the Groups and Genera  in FL