1/ Rotala - most likely macrandra.
2/ Looks like Hemigraphis - not an aquatic!!
3/ Echinodorus bleheri (now re-named Echinodorus grisebachii 'bleheri', I think)
4/ Hydrocotyle - most likely leucocephala.
5/ Looks like Alternanthera of some kind.
6/ Looks like Alternanthera - or maybe a Ludwigia repens.
7/ Hygrophila difformis.
8/ Cabomba - most likely carolineana.
9/ Vallisneria, Sagittaria or Cyperus.
10/ Looks like Selaginella - not an aquatic !!
11/ Vallisneria of some species.
