Veronica serpyllifolia Linnaeus var. humifusa (Dickson) Vahl. Phen: Apr-Jun. Hab: Damp places. Dist: Circumboreal, south in North America to NY (including Long Island), n. MI, WI, MN, NM, AZ, and CA. Kartesz (2022) has as south to NY, including Long Island. May range south to MD, fide Pennell (1935) and Kartesz (1999).

Origin/Endemic status: Native

Synonymy: = C, G, GrPl, Mi; = Veronica humifusa Dicks. – Pennell (1935); = Veronica serpyllifolia L. ssp. humifusa (Dicks.) Syme – K1, K3, K4, NE, NY, Stace (2010), Walters & Webb (1972) in Tutin et al (1972); = Veronica tenella All. – F; < Veronica serpyllifolia L. – FNA17, Il

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