@article {168, title = {Arctagrostis (Poaceae, tribe Pooideae) in North America and Greenland}, journal = {Canadian Journal of Botany}, volume = {68}, number = {11}, year = {1990}, pages = {2422-2432}, isbn = {1480-3305}, author = {Aiken, S. G. and Lefkovitch, L.P.} }