Nigel Cattlin / Scarlet pimpernel (Anagallis arvensis). England, UK. September.

Nigel Cattlin / Scarlet pimpernel (Anagallis arvensis) growing as arable weed. England, UK. September.

Alex Hyde / Vegetaion including huge leaves of (Gunnera insignis) growing next to the crater rim of Volcano Irazu, 3400m Costa Rica

Alex Hyde / Poor Man's umbrella (Gunnera insignis) growing around the caldera rim of Volcano Irazu, Costa Rica

Stephen Dalton / Scarlet pimpernel (Anagallis arvensis) in flower, Sussex, UK

Nick Upton / Bog pimpernel (Anagallis tenella) flowers and flowerbuds in marshy grassland, Devon, UK, June.

Nick Upton / Bog pimpernel (Anagallis tenella) flowering in marshy grassland, Devon, UK, June.

Nick Upton / Scarlet pimpernel (Anagallis arvensis) growing on seashore at the base of a cliff, Cornwall, UK, September.

Alex Hyde / Scarlet Pimpernel (Anagallis arvensis) Devon, UK. June.

Paul Harcourt Davies / Scarlet Pimpernel (Anagallis arvensis) in flower in garden at Podere Montecucco, Orvieto, Umbria, Italy, July.

Paul Harcourt Davies / Scarlet Pimpernel (Anagallis arvensis) in flower in garden at Podere Montecucco, Orvieto, Umbria, Italy, July.

Martin Gabriel / Poorman's Umbrella (Gunnera insignis) growing at an altitude of 3200m on Irazu volcano, Costa Rica, February