Philippe Clement / Common horsetail sporangiophore {Equisetum arvense} France
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Gerry Ellis / Field Horsetail (Equisetum arvense), Pacific coast, North America
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Gerry Ellis / Field Horsetail (Equisetum arvense) among other various vegetation, Pacific coast, North America
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Kevin Schafer / Field Horsetail (Equisetum arvense) plants emerging from shallow water, Moses Coulee, Washington
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Piotr Naskrecki / Field Horsetail (Equisetum arvense) stems topped with spore-producing strobilus, Estabrook Woods, Massachusetts
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Guy Edwardes / Marsh fritillary butterfly (Euphydryas aurinia) roosting on Horsetail (Equisetum arvense), Rhodope Mountains, Bulgaria. June.
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Nick Upton / Common horsetail (Equisetum arvense) dense stand of sterile stems in around pool margin in damp deciduous woodland, Kenfig National Nature Reserve, Glamorgan, Wales, UK, May.
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Nick Upton / Common horsetail (Equisetum arvense) dense stand of sterile stems in damp deciduous woodland, Kenfig National Nature Reserve, Glamorgan, Wales, UK, May.
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Nick Upton / Common horsetail (Equisetum arvense) dense stand of sterile stems around pool margin in damp deciduous woodland, Kenfig National Nature Reserve, Glamorgan, Wales, UK, May.
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Nigel Cattlin / Common horsetail (Equisetum arvense) spore-bearing and non-photosynthetic fertile shoots of a rhizomatous plant.
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Ross Hoddinott / Large red damselfly (Pyrrhosoma nymphula) resting on common horsetail, Broxwater, Cornwall, UK. April .
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Pal Hermansen / Field horsetail (Equisetum arvensis) Photograph taken with the Kirlian technique, a technique which allows imaging of electrical coronal discharge.
