That's not a Potentilla. Its not even in the Rosaceae. Its not even a native
Australian species.

Its a Ludwigia peploides, an introduced weed.

http://images.google.com/images?svnu...es&btnG=Search


wrote in message
oups.com...
Hello,

I recently took this photograph and I am trying to identify it. The
closest I got was "Potentilla eriocarpa", but I don't this that is
correct.

The flower was growing in a small creek in Australia in Brisbane
Forest.

http://www.devsiden.info/images/gulblomst.jpg