Crystalwort
Riccia fluitans
Moss / Liverwort
Floating
BeginnerModerate
Undulata is most often used midground and background, so these coexistence guides focus on other plants that can share that space and care envelope without turning the scape into a maintenance fight.
Riccia fluitans
Lilaeopsis mauritiana
Spiranthes odorata
Lysimachia nummularia
Sagittaria platyphylla
Riccardia chamedryfolia
Penthorum sedoides
Lagenandra nairii
Lagenandra thwaitesii
Lobelia cardinalis
Limnophila sessiliflora
Hygrophila polysperma
Eleocharis montevidensis
Micranthemum tweediei
Limnobium laevigatum
Hygroryza aristata
Salvinia cucullata
Salvinia natans
Vallisneria spiralis
Vallisneria americana
Lilaeopsis brasiliensis
Phyllanthus fluitans
Azolla filiculoides
Wolffia arrhiza