CoontaiI: No roots. Typically requires 3-5 visit maintenance plan per summer. Will float in from neighboring areas and may repopulate quickly.
Flat Stem Pondweed: Firmly rooted, typically in sandy sediment. Requires thorough root removal. May be better to leave alone to prevent less- desirable plants from moving in.
Broad/clasping Leaf: Tough stems; roots firmly, typically in sandy sediment. Grows in beds. Highly resistant to chemical control.
Elodea: Stems form large mass near lake bottom. Compact structure not ideal for fish habitat. Often seen in nuisance conditions. Must collect all fragments.
Eelgrass: Grows very close to bottom in hard sand sediment. Feels like grass. Not possible to de-root 100%; highly resistant to chemical control. May advise to leave alone, or trim down.
Northern Milfoil (above left), often mistaken for Coontail, is not invasive. By-the-root control is effective.