Solidago nemoralis subsp. decemflora
Phytologia 58: 430. 1985.
Basal leaves often linear-oblanceolate, usually not crenate. Involucres usually 4.6–5.8 mm. Disc corolla lobes (0.6–) 0.8–1.5 mm. Cypselae moderately strigose; pappi usually exceeding ray corolla-tubes and bases of disc corolla lobes. 2n = 36.
Phenology: Flowering Aug–Oct.
Habitat: Open, sandy and gravelly soils, disturbed sites, roadsides, prairies and grasslands, drier open mixed deciduous and conifers woods
Elevation: 200–1600 m
Alta., B.C., Man., Ont., Sask., Ark., Colo., Ill., Ind., Iowa, Kans., Mich., Minn., Mo., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Wyo.
Subspecies decemflora is the tetraploid prairie and lower elevation cordilleran race of the species. Combinations based on Solidago longipetiolata have been applied to this race; the name does not have nomenclatural priority.