n.
草地早熟禾,蓝草(尤指肯塔基蓝草)

[ noun ]
any of various grasses that thrive in the presence of abundant moisture
<noun.plant>

Poa \Po"a\, n. [NL., fr. Gr. ? grass.] (Bot.)
A genus of grasses, including a great number of species, as
the kinds called {meadow grass}, {Kentucky blue grass}, {June
grass}, and {spear grass} (which see).


meadowgrass \meadowgrass\, meadow grass \meadow grass\n.
Any of various grasses that thrive in the presence of
abundant moisture, especially those of the genus {Poa},
common in meadows, and of great value for hay and for
pasture. See {Grass}.
[1913 Webster + WordNet 1.5]