"Stewart Robert Hinsley" wrote
Perhaps a garden escape/throwout, as it's not readily recognisable as a
native species.
http://www.stewart.hinsley.me.uk/Images/Dicot68a.jpg
Original photo (large)
http://www.stewart.hinsley.me.uk/Images/IMG_6191.jpg
Not something I recognise as a garden pond plant. Could it be, like some
tropical plants, that it has different and quite different immersed and
emerged states.
-- Regards
Bob Hobden
Posting to this Newsgroup
from the W.of London. UK