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Equisetum fluviatile

Equisetum fluviatile L.

Equisetum fluviatile L. var. limosum (L.) Gilbert

Equisetum limosum L.

Water Horsetail, Swamp Horsetail

KingdomPlantaePlants, but not fungi, lichens, or algae (from Stearn’s Botanical Latin)
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionEquisetophytaHorsetails, which date back to the Devonian era
ClassEquisetopsidaHorsetails, spore-bearing plants related to ferns
OrderEquisetalesLiving horsetails (most are extinct)
FamilyEquisetaceaeLiving horsetails
GenusEquisetumLiving horsetails
SpeciesfluviatileWater horsetail

About plant names...

Water horsetail is the smoothest of the horsetails. Fluviatile is Latin for “pertaining to rivers,” and this horsetail is common in wet, marshy areas. Like other horsetails, water horsetails have a remarkably high silica content, making them abrasive enough for scouring or sanding.

Identification: Water horsetails occur in dense colonies, where they may be unbranched or multiply branched. If branches are present, they are less than 3" (7.6 cm) long. Each segment boundary is ringed by a series of tiny, black-tipped scale leaves. The stems of water horsetails are smoother than those of marsh horsetails. See Equisetum for a comparison chart.

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

From Britton, Nathaniel Lord, and Brown, Addison, An illustrated flora of the northern United States, Canada and the British Possessions, 1913, p. Vol. 1: 41

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

By Luc Viatour

References:

Cobb, Boughton, Farnsworth, Elizabeth & Lowe, Cheryl, Peterson Field Guides: A Field Guide to Ferns and Their Related Families of Northwestern and Central North America, Houghton Mifflin Company, 2005, p. 342

Online References:

Equisetum fluviatile on Earl J.S. Rook's Flora, Fauna, Earth, and Sky ... The Natural History of the Northwoods

Equisetum fluviatile at the Lady Bird Johnson Wildflower Center

Equisetum fluviatile at the Washington State Department of Ecology

Equisetum fluviatile on Wikipedia

Equisetum fluviatile on Welcome to the Wonderful World of Equisetum (aka Michael Matus' Homepage)

Equisetum fluviatile on Plants for a Future, a resource and information centre for edible and otherwise useful plants

Equisetum fluviatile at the University of Wisconsin's Robert W. Freckmann Herbarium

Equisetum fluviatile on eFloras

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

4/23/2016 · Big Tree/Porcupine Trail, Beaver Brook Conservation Area, Hollis, MA ID is uncertain

Equisetum fluviatile description by Thomas H. Kent, last updated 14 May 2016.

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Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

4/23/2016 · Big Tree/Porcupine Trail, Beaver Brook Conservation Area, Hollis, MA ID is uncertain

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

5/23/2009 · West Fork of Oak Creek Trail, AZ
≈ 33 × 50" (84 × 126 cm)

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

5/25/2008 · Memphis, TN · By Tim Chandler

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

These must have been mowed last fall. · 4/6/2010 · Nashua River Rail Trail, Groton, MA
≈ 14 × 9" (35 × 23 cm) ID is uncertain

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

4/6/2010 · Nashua River Rail Trail, Groton, MA
≈ 12 × 12" (29 × 29 cm) ID is uncertain

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

4/7/2010 · Nashua River Rail Trail, Groton, MA
≈ 17 × 14" (44 × 35 cm) ID is uncertain

Equisetum fluviatile (Water Horsetail, Swamp Horsetail)

9/2/2007 · OR
≈ 33 × 22" (82 × 55 cm)

Range:

About this map...