plants that don't need to be planted

[Penncentralfan]

I would like some plants that don't require to be planted into the substrate. I know anubias is best tied to a rock or piece of driftwood and not planted. Are there other plants that are submerged but don't need to be planted in the substrate.

I have a substrate that just won't work best with plants. I have large natural pebble substrate.

 

[azmodan]

Java fern (there are several different varieties), mosses, bolbitis. Many plants can just be floated too, such as water sprite, frogbit, dwarf water lettuce, anacharis, etc.

 

[Fishninja]

I like naja grass or guppy grass