Edit, I think I have ID them:
Plant 1, could beMyriophyllum triphyllum or M. propinquum?
Plant 2, Lilaeopsis ruthiana or Lilaeopsis novae-zelandiae by the looks.
Edit 2, Some sites seem to list Lilaeopsis ruthiana and Lilaeopsis novae-zelandiae as the same plant, but the pic of Lilaeopsis novae-zelandiae that is on fnzas plant ID is nothing like what I have, but it does match the descriptions of Lilaeopsis ruthiana
Plant 1; Found in medium light/part shaded, cold stream as enters a lake so lowish flow:
Plant 2; Found in full sun, lake edge - damp to about 300mm down, propagation by runners - plants about 20 - 30mm apart: