Name this plant please

[grenso]

Does anyone know what type of plants these are and their names? They have been in my tank for a while and I am still trying to find out their names. The first one is like duckweed except it is bushy underneath. The second, has the growth pattern of riccia and does not have a rooting system.

Grenso

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[GhostKnife]

I thought duck weed for sure...Weired?

[fischkopp]

The stringy weed could be Utricularia gibba. I am not sure though ...