The Collaborative International Dictionary of English v.0.48:

Kentucky \Ken*tuck"y\, prop. n.
   One of the United States.
   [1913 Webster]

   Kentucky blue grass (Bot.), a valuable pasture and meadow
      grass (Poa pratensis), found in both Europe and America.
      See under Blue grass.

   Kentucky coffee tree (Bot.), a tall North American tree
      (Gymnocladus Canadensis) with bipinnate leaves. It
      produces large woody pods containing a few seeds which
      have been used as a substitute for coffee. The timber is
      very valuable.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blue grass \Blue" grass`\ (Bot.)
   A species of grass (Poa compressa) with bluish green stems,
   valuable in thin gravelly soils; wire grass.
   [1913 Webster]

   Kentucky blue grass, a species of grass (Poa pratensis)
      which has running rootstocks and spreads rapidly. It is
      valuable as a pasture grass, as it endures both winter and
      drought better than other kinds, and is very nutritious.
      [1913 Webster]