Related Clues:
- Part of a pond problem
- Tree hugger?
- Cushiony forest seat
- Prince Edward Island crop, Irish _____
- Aquatic organisms
- Primitive water organism
- Non-flowering plant
- Rolling stones' lack
- Chlorophyll-containing microorganism
- Hart of Broadway
- Rock coat
- Spirogyra, e.g.
- Bryologist's interest
- Forest-floor cover
- Lake organism