Cyril Ruoso / Crimson clover (Trifolium incarnatum), grown as green manure. Yonne, Bourgogne-Franche-Comte, France. April.

Fabrice Cahez / Crimson clover (Trifolium incarnatum) flowers, Vosges, France, July.

Wild Wonders of Europe / Widstrand / Narrow-leaved crimson clover (Trifolium angustifolium) Velebit Nature Park, Rewilding Europe area, Velebit mountains, Croatia

Philippe Clement / Crimson clover (Trifolium incarnatum) low angle view of field cultivated as fodder, La Brenne, France

Kerstin Hinze / Crimson clover (Trifolium incarnatum), Lower Saxony, Germany, June

Kerstin Hinze / Crimson clover in flower (Trifolium incarnatum), Lower Saxony, Germany, June

David Welling / Crimson / Italian clover {Trifolium incarnatum} California, USA

Shattil & Rozinski / Alpine clover {Trifolium dasyphyllum} flowering on alpine tundra, Colorado, USA

David Welling / Looking down on a bed of Crimson clovers {Trifolium incarnatum} in Redwoods National Park, California

Philippe Clement / Field of Crimson clover {Trifolium incarnatum} cultivated as fodder, La Brenne, France.

Nick Upton / Long-headed clover (Trifolium incarnatum molineri) seedhead, a very rare plant of coastal grassland in the UK found only on The Lizard Peninsula, Cornwall, UK. June.