No - the few plants growing in the wild that I've seen have either been
completely submerged (as you have described) or half-in/half-out at the
edges of pools. Admittedly these have all been D. spathulata or D. pygmae
in the eastern states of Australia where we don't have a great variety
of species... :-(
Is Allen still at his old address - sounds like it's time to investigate
his plant/seed list again. ;-)
+-----------------------------------------------------------------------------+
| John Taylor [Catweasel] | Royal Melbourne Institute of Technology |
| rphjt@minyos.xx.rmit.oz.au | Department of Applied Physics |
| | Melbourne, Victoria, AUSTRALIA |
+-----------------------------------------------------------------------------+