Calamagrostis canadensis

Bluejoint

Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
(unranked):	Commelinids
Order:	Poales
Family:	Poaceae
Genus:	Calamagrostis
Species:	C. canadensis
Binomial name
*Calamagrostis canadensis* (Michx.) P.Beauv.
Varieties
C. c. var. langsdorffii (Link) Inman C. c. var. macouniana (Vasey) Stebbins ^{List source :}
Synonyms
C. c. var. imberbis (Stebbins) C.L.Hitchc. [ = C. canadensis ] C. c. var. pallida (Vasey & Scribn.) Stebbins [ = C. canadensis ] C. c. var. robusta Vasey [ = C. canadensis ] C. c. var. typica Stebbins [ = C. canadensis ] C. anomala Suksd. [ = C. canadensis ] C. atropurpurea Nash [ = C. canadensis ] C. expansa var. robusta (Vasey) Stebbins [ = C. canadensis ] C. hyperborea Lange [ = C. canadensis ] C. inexpansa var. cuprea Kearney [ = C. canadensis ] C. inexpansa var. robusta (Vasey) Stebbins [ = C. canadensis ] C. scribneri Beal [ = C. canadensis ] C. c. subsp. langsdorffii (Link) Hultén [ = var. langsdorffii ] C. c. var. lactea (Beal) C.L.Hitchc. [ = var. langsdorffii ] C. c. var. scabra (J.Presl) Hitchc. [ = var. langsdorffii ] Calamagrostis × lactea Beal (pro sp.) [ = var. langsdorffii ] C. lactea Beal [ = var. langsdorffii ] C. langsdorffii (Link) Trin. [ = var. langsdorffii ] C. nubila Louis-Marie [ = var. langsdorffii ] C. macouniana (Vasey) Vasey [ = var. macouniana ] Arundo canadensis Michx. (basionym) ^{List sources :}

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Calamagrostis canadensis is a species of grass, having three or more varieties, in the Poaceae family. 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 varieties often overlap in where they are distributed.

Most states in the U.S. have one or more varieties of C. canadensis, the most common by distribution being C. c. var. canadensis. Only Minnesota, New Hampshire, New York, and Vermont have all three; and only one, Kentucky, has C. c. var. macouniana with no others.

15 states have only C. c. var. canadensis, without others (Arizona, Delaware, Idaho, Indiana, Kansas, Maryland, Maine, North Carolina, Nevada, New Mexico, Rhode Island, Tennessee, Utah, West Virginia, and Wyoming); and no state has C. c. var. langsdorffii without sharing territory with C. c. var. canadensis.

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Wikipedia