Nice theme but so hard to choose just one. Anyway I'll enter with a picture of my favorite plant, for its beauty and for its strength to survive on the sand!
Pancratium maritimum, or sea daffodil usually grows on sandy beaches around the Mediterranean sea. This shot is from eastern Crete, Greece. I visit this beach every fall when they blossom, it is an irresistible spectacle I cannot bear to loose!
