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Ferns and Horsetails (Monilophytes)
Clubmosses and Quillworts (Lycophytes)
Generally small to medium ferns, although some tropical species are larger. Usually tufted, with a short, creeping rhizome. Rhizome scales latticed (clathrate). Leaves usually tough, shiny on the upper surface; sori elongated along veins of leaf-segments; indusium following the same form as the sorus, sometimes becoming so crowded they appear to cover the whole underside of the leaf-segment. European species are mostly plants of rocky situations, and several have made the transition to man-made habitats such as walls.

Hartstongue Fern and Rustyback Fern are sometimes included in Asplenium and sometimes separated out as separate genera - Phyllitis and Ceterach. Here I have included them in Asplenium. Their status (and that of some other genera not occurring in these islands sometimes included in Asplenium, such as Camptosorus and Schaffneria) is the subject of much recent research and debate. The hybrids between scolopendrium and other Asplenium species, often referred to by the hybrid genus name of x Asplenophyllitis, are here also included in Asplenium.

About 600-700 species worldwide. 11 species in Britain and Ireland (using the more inclusive definition of Asplenium), one of which occurs only in Britain, another only in Ireland.
Asplenium adiantum-nigrum Black Spleenwort Asplenium adiantum-nigrum thumbnail, link to A. adiantum-nigrum page
Asplenium ceterach Rustyback Fern Asplenium ceterach thumbnail, link to A. ceterach page
Asplenium csikii Lobed Maidenhair Spleenwort Asplenium csikii thumbnail, link to A. csikii page
Asplenium marinum Sea Spleenwort Asplenium marinum thumbnail, link to A. marinum page
Asplenium obovatum Lanceolate Spleenwort Asplenium obovatum thumbnail, link to A. obovatum page
Asplenium onopteris Acute-leaved Spleenwort Asplenium onopteris thumbnail, link to A. onopteris page
Asplenium ruta-muraria Wall Rue Asplenium ruta-muraria thumbnail, link to A. ruta-muraria page
Asplenium scolopendrium Hart's Tongue Fern Asplenium scolopendrium thumbnail, link to A. scolopendrium page
Asplenium septentrionale Forked Spleenwort Asplenium septentrionale thumbnail, link to A. septentrionale page
Asplenium trichomanes Maidenhair Spleenwort Asplenium trichomanes thumbnail, link to A. trichomanes page
Asplenium viride Green Spleenwort Asplenium viride thumbnail, link to A. viride page
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