Nick Upton / Giant Horsetail (Equisetum telmateia) sterile stems growing in damp woodland. Wiltshire, UK, June.
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Kirkendall-Spring / Upper Horsetail (Pony Falls) in the Columbia River George National Scenic Area, Oregon, USA, November 2010
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Kirkendall-Spring / Upper Horsetail (Pony Falls) in the Columbia River George National Scenic Area, Oregon, USA, November 2010
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Piotr Naskrecki / Water Horsetail (Equisetum fluviatile) young shoot with water drops
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Piotr Naskrecki / Water Horsetail (Equisetum fluviatile) stem and cone, Estabrook Woods, Massachusetts
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Piotr Naskrecki / Field Horsetail (Equisetum arvense) releasing sporophytes, Estabrook Woods, Massachusetts
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Paul Hobson / Common field Horsetails (Equisetum arvense) in spring showing cones, Yorkshire, UK, May
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Paul Hobson / Common field Horsetails (Equisetum arvense) in spring showing cones, Yorkshire, UK, May
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Paul Hobson / Common field Horsetails (Equisetum arvense) in spring showing cones, Yorkshire, UK, May
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Sven Zacek / Boreal forest landscape with horsetail, Estonia, Spring
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Sven Zacek / Boreal orest landscape with horsetail, Sweden, Scandinavia, Summer.
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Wild Wonders of Europe / Wothe / Close-up of Great horsetail (Equisetum telmateia) stem, Poloniny National Park, Western Carpathians, Eastern Slovakia, Europe, June 2009
