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Trichostema coeruleum (Michaux) K.S. McClelland & Weakley. Section: Isanthus. Glade Blue Curls, False Pennyroyal. Phen: (Jul-) Aug-Sep (-Oct). Hab: Shale barrens, outcrops of calcareous or mafic rock, diabase barrens, calcareous dry prairies, disturbed rocky areas. Dist: VT and s. ON west to MN and NE, south to c. and w. NC, nc. SC, nw. GA, AL, MS, TX, and AZ.

Origin/Endemic status: Native

Synonymy: = McClelland & Weakley (2023) in Weakley et al (2023); = Isanthus brachiatus (L.) Britton, Sterns, & Poggenb. – C, F, Il, K1, S, Tn, WV; = n/a – RAB, Tat; = Trichostema brachiatum L. – Ar, GrPl, K3, K4, Mi, NcTx, NE, NY, Pa, Tx, Va, W, Lewis (1945); > Isanthus brachiatus (L.) Britton, Sterns, & Poggenb. var. brachiatus – G; > Isanthus brachiatus (L.) Britton, Sterns, & Poggenb. var. linearis Fassett – G

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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷

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