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Family	Scientific Name	Common Name	Habitat	Distribution	Image
Equisetaceae	Equisetum ×jesupii	Jesup's Horsetail	Wet thickets, bogs, shores.	NL west to AK, south to n. NJ, s. OH, c. IL, WY, ID, and OR.
Equisetaceae	Equisetum ×litorale	Shore Horsetail		Reported by FNA for VA.
Equisetaceae	Equisetum ×nelsonii	Nelson's Scouring-Rush	Shores and banks.	QC, ON, MT, and OR, south to NY, IN, IL, and WY.
Equisetaceae	Equisetum arvense	Field Horsetail, Bottlebrush Horsetail	Moist streambanks, bottomlands, moist disturbed sites, road banks, railroad banks.	A circumboreal species, in North America south to c. GA, c. AL, c. MS, n. AR, n. TX, NM, and AZ.
Equisetaceae	Equisetum ferrissii	Ferriss's Horsetail	Riverbanks, wet forests.	There are old reports, repeated in RAB, S, and FNA, of the occurrence of E. ×ferrissii in NC and SC; documentation of these reports is not known; it is reported for Prince George's County, MD (Shetler & Orli 2000), for KY (Campbell & Medley 2007), and for all 75 counties of AR (Peck 2011).
Equisetaceae	Equisetum fluviatile	Water Horsetail, Pipes	Open calcareous wetlands, wet meadows, river and lake margins.	Circumboreal, south in North America to n. VA, n. WV, PA, OH, IN, IL, IA, and WA.
Equisetaceae	Equisetum laevigatum	Smooth Scouring-Rush	Moist areas.	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.
Equisetaceae	Equisetum praealtum	Tall Scouring-Rush, River Scouring-Rush	Riverbanks, alluvial floodplains.	Widespread in North America, and south to s. Mexico and El Salvador.
Equisetaceae	Equisetum pratense	Meadow Horsetail	Streambanks, moist forests.	Circumboreal, south in North America to n. NJ, w. NY, s. MI, n. IL, IA, w. SD, w. MT, and BC.
Equisetaceae	Equisetum ramosissimum var. ramosissimum	Branched Scouring-Rush	Disturbed areas.	Native of the Old World, where it is widespread in Europe, Asia, and Africa. This species was apparently introduced long ago on ship's ballast to various old ports, such as Wilmington (New Hanover County, NC), Pensacola (Escambia County, FL) and New Orleans, LA. It is locally naturalized on the Wilmington waterfront, persisting in disturbed areas, such as in gravel along railroad tracks. Hauke (1979, 1984, 1992) discusses the occurrence of this species in North America.
Equisetaceae	Equisetum scirpoides	Dwarf Scouring-Rush	Fens, conifer swamps.	Circumboreal, south in North America to MA, CT, s. NY, nw. PA, n. IL, ne. IA, SD, WY, ID, and WA.
Equisetaceae	Equisetum sylvaticum	Woodland Horsetail	Seepage swamps.	Circumboreal, south in North America to MD, n. VA, ec. WV, OH, MI, WI, IA, WY, MT, and WA.
Equisetaceae	Equisetum variegatum	Variegated Scouring-Rush	Wet thickets, bogs, shores.	Circumboreal, south in North America to n. NJ, nw. PA, n. OH, n. IN, c. IL, c. MN, w. SD, NM, AZ, and OR.