Solidago altissima Linnaeus var. pluricephala M.C. Johnston. Subgenus: Pleiactila. Section: Unilaterales. Subsection: Triplinervae. Series: Canadenses. Southern Tall Goldenrod. Phen: Aug-Oct. Hab: Fields, roadsides, disturbed areas. Dist: Se. VA, NC, TN, AR, and OK south to c. peninsular FL, s. TX, and adjacent Mexico.

Origin/Endemic status: Native

Taxonomy Comments: See Semple et al. (2015) for detailed information. Semple (2022) reports tetraploid (2n=36), pentaploid (2n=45), and hexaploid (2n=54) chromosome counts for var. pluricephala, with hexaploid counts across most of its distribution, except tetraploid counts in w. LA and TX; the lone pentaploid count is from s. TX.

Synonymy: = K4, Tx, Semple et al (2015); < Solidago altissima L. – F, GW2, K1, Mex, Pa, RAB, WV; < Solidago altissima L. ssp. altissima – FNA20; < Solidago altissima L. var. altissima – Va, Nesom (1989b); < Solidago canadensis L. – W; < Solidago canadensis L. var. scabra Torr. & Gray – C, Fl7, G, SE1, WH3; < Solidago hirsutissima Mill. – S

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU (taxonomic lump from wetland indicator species)
• Eastern Mountains and Piedmont: FACU (taxonomic lump from wetland indicator species)
• Great Plains: FACU (taxonomic lump from wetland indicator species)
• Midwest: FACU (taxonomic lump from wetland indicator species)
• Northcentral & Northeast: FACU (taxonomic lump from wetland indicator species)

Heliophily: 8