Fossombronia foveolata
The following are the most common species likely to be confused with F. foveolata, but there are several less common Fossombronia species that are worth being aware of.
Fossombronia pusilla
Common Frillwort
Fossombronia wondraczekii
Acid Frillwort
Fossombronia caespitiformis
Spanish Frillwort
Petalophyllum ralfsii
Petalwort