The ligule is truncate, membranous, short and abrupt. Leaf blades are flat or folded with smooth surfaces. Groves are apparent on each side of a conspicuous midrib. The blade terminates in a boat-shaped tip. The inflorescence of Kentucky Bluegrass is panniculate and open with a pyramid shape.
Spikelets are small, flattened, and laterally compressed with persistent axes.
They are not secund. Rachilla extends beyond last female fertile floret. Each spikelet has from three to five seeds. Florets are carinate and lacking a germination flap. The lemmas are similar in texture to the glumes.