Cinna is a small genus of grasses known by the common name woodreeds. There are only four known species but they are quite widespread in the Americas and northern Eurasia. Woodreeds are perennial grasses with long, soft panicle inflorescences. They are found in moist areas, especially near bodies of water.

Species

Formerly included

Species now considered better suited to other genera: Agrostis, Andropogon, Arctagrostis, Calamagrostis, Dichelachne, Echinopogon, Limnodea, Muhlenbergia, Pogonatherum, and Sporobolus