Trichostema dichotomum Linnaeus. Section: Trichostema. Common Blue Curls. Phen: Aug-Nov. Hab: Dry woodlands, longleaf pine sandhills and dry flatwoods, disturbed areas, roadsides, thin soils around rock outcrops. Dist: ME, ON, QC, MI, and IA, south to c. FL and TX.

Origin/Endemic status: Native

Synonymy: = Ar, C, Il, Mi, NcTx, NE, NY, Pa, RAB, S, Tat, Tn, Tx, Va, W, WV, McClelland & Weakley (2019) in Weakley et al (2019a); = Trichostema dichotomum L. var. dichotomum – G; < Trichostema dichotomum L. – Fl6, K1, K3, K4, WH3; > Trichostema dichotomum L. var. dichotomum – F; >< Trichostema dichotomum L. var. puberulum Fernald & Griscom – F

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Wetland Indicator Status:

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

Heliophily ?: 8