intramarginal

navigate by keyword : arising aspleniaceae aspleniales asplenium boniniella camptosorus ceterach classifications consider consisting distantly family fern ferns flap genera generic genus however hybridize hymenasplenium included including indusium intramarginal linear maintain most neottopteris nested nnmembers phyllitis phylogenenetic polypodiales pteridologists readily recent recognized recommends related segregate segregated should sori species spleenworts still study such suggests these two undisputed with within

$Imperforate St. John\'s-Wort (Hypericum maculatum). Leaves Closeup Royalty Free Stock Photo$

$Imperforate St. John\'s-Wort (Hypericum maculatum). Axillary Shoots Closeup Royalty Free Stock Photo$

The Aspleniaceae (spleenworts) is a family of ferns, included in the order Polypodiales or in some classifications as the only family in the order Aspleniales. Members of the family all have intramarginal, linear sori with a flap-like indusium arising along one edge. Most pteridologists today consider this family of consisting of just two genera. Others still maintain segregate genera such as Phyllitis and Ceterach; however, the species segregated into these genera all hybridize readily with undisputed Asplenium species. A recent phylogenenetic study of Aspleniaceae shows that species segregated as Camptosorus and Neottopteris are nested within Asplenium and recommends that they be included in that genus, but suggests that Hymenasplenium (including Boniniella) and Phyllitis are distantly related to other Asplenium species and should be recognized at the generic level.