Jack Dykinga / Water shamrocks / Water clover (Marsilea mucronata) floating on the surface of a canyon pool. Peck Canyon, Atascosa Mountains, Coronado National Forest, Arizona

Jack Dykinga / Canyon pool with Water Shamrocks (Marsilea mucronata) floating. Coronado National Forest, Peck Canyon, Atascosa Mountains, Arizona, November.

Rob Cousins / Decorated bow of a narrow boat, Bristol Floating Harbour, 2008