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