Dong Lei / Sandwort (Arenaria bryophylla) Mt Shishapangma, Mt Qomolangma National Park, Qinghai Tibet Plateau, China.

Ingo Arndt / Seabeach Sandwort (Honkenya peploides) growing on beach, Lake Clark National Park, Alaska, USA, June.

Alex Hyde / Leadwort (Minuartia verna) growing on spoil heap next to lead mine. Peak District National Park, Derbyshire, UK. June.

Alex Hyde / Leadwort (Minuartia verna) growing on spoil heap next to lead mine. Peak District National Park, Derbyshire, UK, May.

Alex Hyde / Leadwort (Minuartia verna) growing on spoil heap next to lead mine. Magpie Mine, Peak District National Park, Derbyshire, UK, May.

Theo Bosboom / Sea sandwort (Honckenya) in autumn colours, Hvalnes, Iceland, September 2009

Colin Varndell / Sea sandwort (Honckenya peploides) flowers on Cogden Beach, Dorset, UK May

Paul Harcourt Davies / Rock sandwort (Minuartia rupestris) in flower, above Pordoi pass, Dolomites. Italy, July

Paul Harcourt Davies / Large-flowered Sandwort (Arenaria grandiflora) photo on the route up Mount Vettore, Sibillini, Umbria, Italy, June

Ingo Arndt / Sea Sandwort (Honckenya peploides) growing on beach, Lake Clark National Park, Alaska

Robert Thompson / Sea sandwort {Honckenya peploides} Annalong Coastal Path, County Down, Northern Ireland, UK, August

Gary K. Smith / Sea Sandwort {Honkenya peploides} growing on shingle beach, Norfolk, UK, June