Dong Lei / Whitlow-grass (Draba amplexicaulis) Mount Kawakarpo, Meili Snow Mountain National Park, Qinghai-Tibet Plateau, Yunnan Province, China. July

Dong Lei / Whitlow-grass (Draba amplexicaulis) Mount Kawakarpo, Meili Snow Mountain National Park, Qinghai-Tibet Plateau, Yunnan Province, China. July

Dong Lei / Whitlow-grass (Draba amplexicaulis) Mount Kawakarpo, Meili Snow Mountain National Park, Qinghai-Tibet Plateau, Yunnan Province, China. July

Paul Harcourt Davies / Yellow whitlow grass (Draba aizoides) at Pennard castle). Campo Imperatore (Abruzzo) Italy, April.

Paul Harcourt Davies / Yellow whitlow grass (Draba aizoides) at Pennard castle. Campo Imperatore (Abruzzo) Italy, April.

Alex Hyde / Round-leaved Penny Cress (Thlaspi rotundiflora) and yellow Whitlow Grass (Draba hoppeana) in flower on rocky plane at 2500 metres altitude in the Aosta Valley, Monte Rosa Massif, Pennine Alps, Italy....

Jeff Wilson / Arctic flowers, Whitlow grass (Draba cinerea) Svalbard, Spitzbergen, Norway, July 2009. Taken on location for the BBC series, Frozen Planet.

Brent Stephenson / Arctic Whitlow grass (Draba sp.) with yellow flowers. Krossfjord, Svalbard, July.

Paul Harcourt Davies / Yellow whitlow grass (Draba aizoides) Apennines, Italy

Konrad Wothe / Whitlow Grass (Draba sp) flowers, Spitsbergen, Norway

Philippe Clement / Annual honesty (Lunaria annua) in flower in wildflower garden in spring, Flanders, Belgium. May.

Andy Sands / Common snipe (Gallinago gallinago) feeding in frost-covered Watercress (Nasturtium officinale) bed in winter, Hertfordshire, England, UK. December