Calystegia soldanella

Calystegia soldanella with immature fruit growing in coastal dunes near Pacific City, Oregon. 

Calystegia soldanella immature fruit sliced open revealing immature seeds with endosperm (clear) and embryo (green) visible.   

Calystegia soldanella with a modified stem (stolon) that was growing horizontally just below the surface of a coastal dune.  

Calystegia soldanella flower bud. 

Calystegia soldanella flower. 

Calystegia soldanella flowering. 

Calystegia soldanella backside of leaves with flower buds.