Solidago canadensis var. canadensis
Mid to proximal stems glabrous or sparsely hairy. Rays florets 7–15 (–18). 2n = 18.
Phenology: Flowering Aug–Oct.
Habitat: Old fields, pastures, disturbed ground, roadsides and open woods
Elevation: 0–1000+ m
Man., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Conn., Del., Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., Ohio, Pa., R.I., Vt., Va., W.Va., Wis., introduced in Europe.
Variety canadensis is cultivated and introduced in western states and in Europe. Typical var. canadensis is readily recognized; more hairy-stemmed plants are similar to var. hargeri, which usually has fewer disc florets. In eastern Canada and northern New England, the variety can be difficult to separate from narrow-leaved forms of S. lepida var. fallax if the array of the latter is not very leafy.