16 native and 6 introduced species of Poa. These quite varied
in habit, although most of the native species form small or large
tussocks and have very narrow, tightly inrolled leaves. They include
some very abundant species (e.g. Poa gunnii is one of the
most common alpine and subalpine grass). The inflorescence is a
loose panicle of very small, awnless spikelets.
is Kentucky bluegrass. P. annua is winter grass.