Calamagrostis canadensis is a species of grass, having three or more varieties, in the family Poaceae. It is known variously by the common names of bluejoint, bluejoint reedgrass, marsh reedgrass, Canadian reedgrass, meadow pinegrass, and marsh pinegrass.
Calamagrostis canadensis takes the form of at least three varieties, including the type. The U.S. Forest Service names others.
The type variety (and autonym), is C. c. var. canadensis. This is the name for C. canadensis after varieties of it were ...