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Solidago riddellii Frank ex Riddell. Subgenus: Pleiactila. Section: Ptarmicoidei. Riddell's Goldenrod. Phen: Aug-Nov. Hab: Wet, calcareous prairies, fens, calcareous swamps, calcareous seeps. Dist: ON and MB south to OH, IN, IL, n. AR, and KS; disjunct in w. VA and nw. GA. The specimen from Fort Monroe ("Fortress Monroe, Va." – Fernald 1950) is accurately identified but seems likely to a mislabeling.

ID notes: The leaves folded along the midvein to a sharp V is a useful field character.

Origin/Endemic status: Native

Taxonomy Comments: A diploid species, 2n=18.

Synonymy: = Ar, C, F, FNA20, G, GrPl, K3, K4, Mi, Oh3; = Oligoneuron riddellii (Frank ex Riddell) Rydb. – Il, K1, Nesom (1993b)

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: OBL
  • Great Plains: OBL
  • Midwest: OBL
  • Northcentral & Northeast: OBL

Heliophily ?: 9

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image of plant© Alan Cressler: Oligoneuron riddellii, Wet Prairie, Coosa Valley Prairies, Floyd County, Georgia 2 by Alan Cressler source | Original Image ⭷

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