thats incorrect Elitefishy. the 2 types are Dwarf riccia and Riccia Fluitians
if you look at the pinned thread in here the 2 are pictured next to each other.
both are naturally floating. dwarf riccia grows much more compact and forms a kind of hedge underwater. fluitians is a little leggy and looks more like a lawn of grass.
dwarf is slower growing and needs more light than fluitians to pearl nicely. both will survive in a simple 1 wpg tank but wont pearl properly untill about 2 wpg with co2.
as far as i know both types come from japan/singapore or somewhere in that direction. we dont get it naturally in europe (not that i know of anyway)
