High Quality Content by WIKIPEDIA articles! Poa howellii is a species of grass known by the common name Howell's bluegrass. It is native to western North America from British Columbia to northern California, where it grows in rocky areas in woodlands and chaparral, as well as disturbed areas. It is an annual grass growing in dense, narrow tufts up to 80 centimeters tall. The inflorescence is a series of whorls of branches bearing spikelets, the branches growing appressed to the stem and then spreading out from the stem as the spikelets mature. Poaceae or Gramineae is a family in the Class Liliopsida (the monocots) of the flowering plants. Plants of this family are usually called grasses, or, to distinguish them from other graminoids, true grasses; the shrub- or tree-like plants in this family are called bamboo (there are also herbaceous, non-woody bamboos). There are about 600 genera and some 9,000 10,000 or more species of grasses (Kew Index of World Grass Species). Plant communities dominated by Poaceae are called grasslands; it is estimated that grasslands comprise 20% of the vegetation cover of the earth.
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