Some of the information for this article was drawn from: Budd's Flora of the Canadian Prairie Provinces, by J. Looman and K.F. Best Research Branch, Agriculture Canada Publication 1662, 1987.   Some books to help you identify Manitoba's asters or other wildflowers: Budd's Flora of the Canadian Prairie Provinces, by J. Looman and K.F. Best Research Branch, Agriculture Canada Publication 1662, 1987. The Peterson Field Guide Series, No. 17: A Field Guide to Wildflowers of Northeastern and Northcentral North America by R.T. Peterson and M. McKenny. 1968. Houghton Mifflin Co. A Guide to Field Identification: Wildflowers of North America, by F.D. Venning. 1984. Golden Press. Manitoba's Tall Grass Prairie: A Field Guide to an Endangered Space by Tom Reaume. Eco Series No. 3, Manitoba Naturalists Society. 1993.