Erlend Haarberg / Crustose lichens (Lecanorales) on rocks in Swedish Padjelanta National Park, Laponia World Heritage Site, Sweden. August. Highly commended in the GDT European Wildlife Photographer of the Year com...

Heather Angel / Paraquilegia (Paraquilegia microphylla) growing in rock fissures with crustose lichen. On cliff, Baimashan, Sichuan Province, China.

Chris Mattison / Crustose lichen (Lecidea lithophila) on sandstone, Derbyshire, England, UK, September.

Chris Mattison / Crustose lichen (Lecanora gangaleoides) on coastal granite, Iona, Scotland, UK, June.

Chris Mattison / Sea ivory (Ramalina siliquosa) and Crustose lichen (Lecanora gangaleoides) on coastal rocks, Mull, Scotland, UK, June.

Chris Mattison / Black shield lichen (Lecanora atra), a crustose lichen found on siliceous rocks, Yorkshire, England, UK, July

Duncan Mcewan / Crustaceous lichens on moorland boulder, Glen Spean, Inverness-shire, Scotland

Duncan Mcewan / Crustaceous lichens on moorland boulder, Glen Spean, Inverness-shire

Duncan Mcewan / Crustaceous lichens {Apothecia, Rhizocarpon geographicum}, moorland rock, Inverness-shire

Albert Lleal / Crustose lichen on volcanic rock, Timanfaya National Park, Spain

Philippe Clement / Stonewall rim lichen / Robed rim lichen (Lecanora muralis), crustose lichen on rock, close up, France. June.

Alex Hyde / False-coloured scanning electron micrograph of a cleaved sample of a crustose lichen growing on grey limestone, the orange are fungal threads and the green shows algal cells. The fungal threads anchor...

Will Watson / Crustose lichens on Silurian limestone stone wall with Black apothecia (Tephromela atra), Lecanora rupicola and Ochrolechia parella, Bradnor Hill, Herefordshire, England, November, focus stacked.

Erlend Haarberg / Crustose lichen (Glypholecia scabra), Innlandet, Norway, July.

Erlend Haarberg / Crustose lichen, Innlandet, Norway, July.

Solvin Zankl / Seeds of Water avens (Geum rivale), Europe. Water aven seeds have numerous hairs, which enable dispersal by wind, as well as a long hooked tail formed by the style, which readily attaches to mammal fu...

Rolf Nussbaumer / Water avens flower opening {Geum rivale} Switzerland.

Geoff Simpson / Water avens seedhead and flower {Geum rivale} Peak District NP, Derbyshire, UK

Geoff Simpson / Water avens seedheads {Geum rivale} Derbyshire, UK

Mike Read / Water avens (Geum rivale) Cuckoo flower (Cardamine pratensis) and Marsh marigold (Caltha palustris) flowering in water meadow, Ringwood, Hampshire, UK April

Gary K. Smith / Water avens (Geum rivale) on white background.

Erlend Haarberg / Water avens (Geum rivale) flowering on the edge of the Gullfoss waterfall, Iceland, June 2008

Ernie Janes / Water avens (Geum rivale), UK

Florian Möllers / Water avens (Geum rivale) and Meadow buttercup(Ranunculus acris) flowering in NSG Kalktuffgelsende, Berlin, Germany.

Andy Sands / Water avens (Geum rivale) close up of flower head, Upper Teesdale, Co. Durham, England, UK, June

Andy Sands / Water avens (Geum rivale) growing en-masse on roadside verge, Upper Teesdale, Co. Durham, England, UK, June

Andy Sands / Water avens (Geum rivale) close up of flower heads, Upper Teesdale, Co. Durham, England, UK, June

Inaki Relanzon / Water avens (Geum rivale). Vallee d' Eyne Reserve Naturel, Haute Cerdagne, Pyrenees Orientales, Languedoc Roussillon, France. July

Wild Wonders of Europe / Giesbers / Water avens (Geum rivale) flowers, Liechtenstein, June 2009

MYN / Niall Benvie / Water avens (Geum rivale) in flower, Tartumaa, Estonia meetyourneighbours.net project

Hermann Brehm / Water avens {Geum rivale} Germany

MYN / Niall Benvie / Water avens {Geum rivale} in flower, Scotland, UK, May meetyourneighbours.net project

Philippe Clement / Water avens seedheads {Geum rivale} Sierra de Gredos, Spain

Solvin Zankl / Seed of Water avens (Geum rivale), Europe. Water aven seeds have numerous hairs, which enable dispersal by wind, as well as a long hooked tail formed by the style, which readily attaches to mammal fur...

Solvin Zankl / flower buds of Water avens (Geum rivale), Europe

Solvin Zankl / Seeds of Water avens (Geum rivale), Europe. Water aven seeds have numerous hairs, which enable dispersal by wind, as well as a long hooked tail formed by the style, which readily attaches to mammal fu...

Solvin Zankl / Flower of Water avens (Geum rivale), Europe

Kim Taylor / Moss Carder Bee (Bombus muscorum) leaving Water Avens (Geum rivale) flower, UK.

Philippe Clement / Water avens seedheads {Geum rivale} Gran Paradiso NP, Alps, Italy

Geoff Simpson / Water avens {Geum rivale} Derbyshire Dales, UK

Thomas Marent / Water Aven (Geum rivale), Aargau Jura Park, Switzerland

Robert Thompson / Water avens (Geum rivale) flowering amongst damp moss, Knockmore, County Fermanagh, Northern Ireland, UK, May

Geoff Simpson / Water aven seedhead {Geum rivale} Derbyshire UK Millers dale Peak District NP

Pal Hermansen / Water avens (Geum rivale) flower. Photograph taken with the Kirlian technique, a technique which allows imaging of electrical coronal discharge.

Will Watson / Marsh avens (Geum rivale) in flood meadow pasture, Volyn Oblast, Ukraine, May.

Will Watson / Marsh avens (Geum rivale) in flood meadow pasture, Volyn Oblast, Ukraine, May.

Steve Nicholls / Water avens (Geum rivale) flower. England, UK, May.