Radomir Jakubowski / Marbled white butterfly (Melanargia galathea) on Horsetail (Equisetum), Herbitzheim near Saarbruecken, Saarland, Germany. Finalist in the Macro category and winner of the audience award in the Montpho...

Guy Edwardes / 2020VISION / Giant horsetail (Equisetum telmateia), Catcott Lows SWT reserve, Somerset Levels, England, UK, April. 2020VISION Book Plate. Did you know? Horsetails can grow to over two metres tall.

Stephen Dalton / Common horsetail (Equisetum arvense) shedding spores, UK

Sven Zacek / Fronds of Horsetail (Equisetum) in Spring, Estonia.

Wild Wonders of Europe / Wothe / Great horsetail (Equisetum telmateia) close-up of stem, Poloniny National Park, Western Carpathians, Eastern Slovakia, Europe, June 2009 WWE BOOK. WWE INDOOR EXHIBITION

Heather Angel / Broomrape (Pedicularis longiflora) in wet meadow amongst Horsetail (Equisetum sp). Maroon marks on flowers act as Nectar guides. Road from Barkham to Ruo Er Gai, Sichuan Province, China. July.

Ross Hoddinott / Blue-tailed damselfly (Ischnura elegans), male on Common horsetail (Equisetum arvense), Cornwall, UK. June.

Sandra Bartocha / Wood horsetail (Equisetum sylvaticum) and Haircap moss (Polytrichum) Lentiira, Finland, September.

Sandra Bartocha / Wood horsetail (Equisetum sylvaticum) with bokeh sunset light, Grythyttan, Sweden, June.

Michel Roggo / Horsetails (Equisetum) Jiuzhaigou National Park, Jiuzhaigou Valley Scenic and Historic Interest Area UNESCO World Heritage Site, Sichuan, China. May 2013. Photographed for The Freshwater Project

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.