Edwin Giesbers / Persian cyclamen (Cyclamen persicum) flowers. Cyprus. April.

Bernard Castelein / Waterviolet / featherfoil (Hottonia palustris) at sunset, Groot Schietveld, Wuustwezel, Belgium

Steve Downer / Timelapse of Primrose (Primula vulgaris) flowers opening, UK. March. Controlled conditions.

Ernie Janes / Cowslips (Primula veris) in flower, Norfolk, England, UK, April.

Dong Lei / Primula (Primula serratifolia) in habitat, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China.

Paul Harcourt Davies / Alpine Snowbell (Soldanella alpina) in flower, above Madoona di Campiglio, Brenta Dolomites, Italy, June 2010

Sandra Bartocha / Cowslip (Primula veris) flowers, Brandenburger Vorstadt, Potsdam, Germany, April

Sandra Bartocha / Cowslip (Primula veris) and Cuckoo Flower (Cardamine pratensis) in flower with light effects, Brandenburger Vorstadt, Potsdam, Germany, April

Alex Hyde / Viscid primrose (Primula latitolia) on mountainside, Nordtirol, Austrian Alps, 2600 metres, June.

Ross Hoddinott / Cowslips (Primula veris) backlit in evening light, Durlston Country Park, near Swanage, Dorset, UK, April.

Guy Edwardes / 2020VISION / Cowslip flowers (Primula veris), Catcott SWT reserve, Somerset Levels, England, UK, April. Photographer quote: 'Finding a perfect group of cowslips takes time, as does washing all your clothes when yo...

Alex Hyde / Dwarf snowbell (Soldanella pusilla) flower in snow. The plant generates heat by fermenting sugars to melt the surrounding snow. Austrian Alps, 2300 metres above sea level, June.