Convolvulus or Calystegia

Many of these small flowers were scattered about on a grass area close to a wood. Growing at an altitude of 1120 m. or some 3400 feet. The zone where the were found is part of the Campania. Photographed August 2013.

 

Convolvulus. Two leaves pointed by arrows are small and distant from calyx.

 

Thank you Tyrlich. I will noww check the Convolvulus keys.