Does anyone know what's the name of the floating plant with roundish leaves that look like frogbit? It has furry leaves while frogbits have smooth leaves (I'm actually not sure if there are 2 types of frogbits - with smooth & furry leaves). It also has long and furry roots that will dangle in the water. It is not salvinia or water lettuce and it propagates quite fast...NA main tank used to have it, but I think now no more.

Experts, if you know what I'm describing, please help to identify the plant. I am not able to provide a pic of it, so make it more difficult for me to find this plant.

Also I'm checking if anyone has 3-4 of these to give? Thanks!