Orsolya Haarberg / Water Horsetails (Equisetum fluviatile) reflected in water, Femundsmarka National Park, Norway.

Orsolya Haarberg / Water horsetail (Equisetum fluviatile) in the Femundsmarka National Park, Norway.

Theo Bosboom / Water horsetail (Equisetum fluviatile) close-up, De Bruuk, the Netherlands, May

Sandra Bartocha / Spider (Pachygnathus listeri ) on Water Horsetail (Equisetum fluviatile) with spider possibly (Pachygnathus lesteri) Germany, May

Sandra Bartocha / Water Horsetail (Equisetum fluviatile) close-up with water droplets, Germany, May

Piotr Naskrecki / Water Horsetail (Equisetum fluviatile) young shoot with water drops

Piotr Naskrecki / Water Horsetail (Equisetum fluviatile) stem and cone, Estabrook Woods, Massachusetts

Jose B. Ruiz / Field horsetail {Equisetum fluviatile} Peak District NP, Derbyshire, UK

Orsolya Haarberg / Water horsetail (Equisetum fluviatile) reflecting in water, Femundsmarka National Park, Norway. September.