Andy Sands / Oxlips (Primula eliator) growing among Wood Anemones (Anemone nemorosa) good indicators of ancient woodland, Suffolk, England, UK, April

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.

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

Stephen Dalton / Buff-tailed Bumblebee (Bombus terrestris) worker bee flying to Cowslip (Primula veris) flowers. UK, 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...

Sandesh Kadur / Drumstick primrose (Primula denticulata) high elevation flowers of the Himalaya. Bhutan, February.

Colin Varndell / Cowslip (Primula veris) flowering in meadow, Cogden, Dorset, England UK. May