Erlend Haarberg / Yellow mountain saxifraga (Saxifraga aizoides) growing on marble. Lahko National Park, Fjell, Norway, July.

Alex Hyde / Yellow mountain saxifrage (Saxifraga aizoides) growing on limestone cliff. Triglav National Park, Julian Alps, 2000m, Slovenia. July 2015.

Ole Jorgen Liodden / Spider saxifrage (Saxifraga flagellaris) growing on wet ground, Svalbard, Norway, June.

Pal Hermansen / Close up of stigma of Marsh saxifrage (Saxifaga hirculus) Svalbard, Norway, July.

Pal Hermansen / Close up of Marsh saxifrage (Saxifraga hirculus) Svalbard, Norway, July.

Paul Harcourt Davies / Musky Saxifrage (Saxifraga moschata) in flower, Monte Spinale, alpine zone, Madonna di Campiglio, Brenta Dolomites, Italy, July

Paul Harcourt Davies / Reddish saxifrage (Saxifraga porophylla) Gran Sasso, Appennines, Abruzzo, Italy, June

Paul Harcourt Davies / Reddish saxifrage (Saxifraga porophylla) Gran Sasso, Appennines, Abruzzo, Italy, June

Erlend Haarberg / Yellow mountain saxifrage (Saxifraga aizoides) flowering by the Osterdalsisen Glacier, Saltfjellet-Svartisen National Park, Nordland, Norway, August 2006

Nick Upton / Yellow mountain saxifrage (Saxifraga aizoides) flowering clump among limestone scree at 1700m in the Julian Alps, Bohinj ridge mountains in the background, Triglav National Park, Slovenia, July

Laurie Campbell / Yellow saxifrage (Saxifraga aizoides) flowering covered in water droplets, Sutherland, Scotland, July

Silvia Reiche / Yellow Mountain Saxifrage (Saxifraga aizoides) flower, Hohe Tauern National Park, Austria