I have several aquatic weeds ID books and looked on the net at all the sites on here for identifying aquatic weeds but have no luck. The plant looks like a 4 leaf clover and is rooted to the bottom of the lake and is along the shoreline out of the water as well. Once mature it floats to the surface and develops into a floating vegetation that has 4 round petals the size of a quarter or maybe half dollar size.

I'm puzzled because I have never seen this plant before and I've checked hundreds of ponds. I treated the surface mats with eagre. I hope this does the trick.

Any recommendations on treating creeping water primose and smartweed?