Solidago altissima Linnaeus var. gilvocanescens (Rydberg) Semple. Subgenus: Pleiactila. Section: Unilaterales. Subsection: Triplinervae. Series: Canadenses. Great Plains Tall Goldenrod. Phen: Aug-Oct. Hab: Stream margins, open areas. Dist: IN, IL, WI, MN, sw. ON, MB, SK, AB, BC south to IN, sc. IL, c. MO, OK, nc. TX, ne. NM.

Origin/Endemic status: Native

Taxonomy Comments: Semple (2022) reports diploid (2n=18), tetraploid (2n=36), and hexaploid (2n=54) chromosome counts for this variety.

Synonymy: = Il, K4, Semple (2022), Semple et al (2015); = Solidago altissima L. ssp. gilvocanescens (Rydb.) Semple – FNA20, K3, Semple (2003); = Solidago altissima L. var. canescens (A.Gray) M.C.Johnst. – Tx; = Solidago canadensis L. var. gilvocanescens Rydb. – C, F, GrPl, K1, NcTx, Nesom (1989b); = Solidago pruinosa Greene – G; < Solidago canadensis L. – S, W

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Wetland Indicator Status:

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

Heliophily ?: 8