Mountain or Appalachian Goldenrod
Solidago curtisii var. flaccidifolia (Small) R.E. Cook & Semple is the more hairy leaved race of the species. The broadest-leaved forms of the species occur in var. flaccidifolia. They can be confused with S. flexicaulis but lack the flexuous distal stem of the latter (Semple & Cook 2006 FNA). The variety occurs at two ploidy levels: tetraploid 2n=36 and hexaploid 2n=54 (Cook & Semple 2008).