Equisetum laevigatum A. Braun. Common name: Smooth Scouring-Rush. Phenology: May-Jul. Habitat: Moist areas. Distribution: QC and BC south to NY, w. PA, s. OH, s. IN, s. IL, AR (Peck 2011), e. TX, NM, AZ, CA, n. Mexico, and n. Central America. Reported for Warren County, w. VA (Sheik & Weeks 2023). There are old reports, repeated in RAB, and S, of this species farther south; documentation of these reports is not known and may be based on misapplication or misidentification.
Origin/Endemic status: Native
Synonymy ⓘ: = AqW, Ar, C, Can, ETx1, FNA2, G, GrPl, Il, K4, Mo1, NS, Pa, POWO, S13, Sf, TxFerns; = Hippochaete laevigata (A.Braun) Farw.; > Equisetum hyemale L. var. intermedium A.A.Eaton — F; > Equisetum kansanum Schaffner — F, Tx; > Equisetum laevigatum A.Braun — Tx. Basionym: Equisetum laevigatum A.Braun 1844
Links to other floras: = Equisetum laevigatum - FNA2
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FAC
- Eastern Mountains and Piedmont: FACW
- Great Plains: FAC
- Midwest: FACW
- Northcentral & Northeast: FACW
Heliophily ⓘ: 5
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