Asplenium trichomanes is often circumscribed as a collective species consisting of various cytotypes (six distinct taxa are known from central and souther Europe, for example). These taxa, which for convenience are often recognized at the subspecific level, are reproductively isolated (producing sterile hybrids when growing together)[]. Different authors have treated them in different ways, but they can all be used interchangeably. Where known, we have included these names in the list of synonyms[].

Common Name: Maidenhair Spleenwort