Which Crowfoot?

Which Crowfoot?

Observation - Which Crowfoot? - UK and Ireland. Description: A water-crowfoot growing in a small, very clean water pond (also containing stoneworts) in chalk downland. More likely to be Pond Water-crowfoot than the very similar Common water-crowfoot from what I've read, but hope someone knowledgeable can advise!

A water-crowfoot growing in a small, very clean water pond (also containing stoneworts) in chalk downland. More likely to be Pond Water-crowfoot than the very similar Common water-crowfoot from what I've read, but hope someone knowledgeable can advise!