Solidago latissimifolia Miller occurs in fresh and brackish swamps and thickets of the coastal plain near the Atlantic coast from Nova Scotia to Florida. The common name is based on a long used binomial for the species S. elliottii Torrey & A. Gray; the Miller name has priority (Uttal and Porter 1988). Involucres mostly 4–6 mm; broader phyllaries 0.7–1.2 mm wide; stems glabrous below arrays; mid cauline leaves elliptic (Semple & Cook 2006 FNA). The species includes diploids 2n=18, tetraploids 2n=36, and hexaploids 2n=54. It could be confused with S. rugosa, but the usually large elliptic leaves and smooth stems are diagnostic. Semple et al. (2021) published a cytogeographic map showing the locations of published counts.