'Ae (Polypodium pellucidum vulcanicum) growing inside cracks in lava. Volcanoes National Park, HI.
Shawagunk conglomerate partially covered with haircap moss (Polytrichaceae), ferns, and lichens. Mohonk Mountain House, New Paltz.
Purslane (Portulaca sp.) in rock crack. Isla Santiago, Galapagos.
