halacha - Can you use algae, water plants (e.g. water lillies), hydroponics or fungi for schach?

My understanding is that schach must be from a plant that specifically grows from the ground. If this is not so, would there be any problems using:

• algae / seaweed / water lilies / swamp scum - these grow or float in water


• fungi or moss - such as mushrooms or other similar items that are not plants but grow on the ground or the bark of trees


• hydroponics - plants grown in the air in a greenhouse