Duckweed has smooth edges.
Azolla has serrated edges.
I had a pondful of Azolla in the frog bog die in a period of 90-100+ weather.
If it survives the summer Azolla turns red in the fall and looks very pretty.
I have duckweed in the big pond. It grows in the filter and on the waterfall.
Any that gets into the pond gets eaten up by the fish.


k30a