The same was what happened to Asplenium anceps. When the climate cooled by successive glaciations, went extinct from north to south and from east to west, being confined to the residual forests of laurel islands of Macaronesia: Canary Islands, Madeira and the Azores, with a temperate climate wet similar to that enjoyed at the time of its greatest expansion.
Since starting its total population decline of Asplenium anceps has gradually decreased, especially in the Canary Islands, where small populations are accompanied by some copies of his vigorous hybrid Asplenium trichomanes ssp. maderense, the result of hybridization between Asplenium anceps and Asplenium trichomanes ssp. quadrivalens. In Tenerife, La Gomera and El Hierro is know a single population in each island with few specimens, being more abundant in the northern half of La Palma.
In the archipelago of the Azores the number of copies is somewhat higher, but is shrinking, becoming more scarce and difficult to locate. Currently only lives in the islands of Faial and Pico, accompanied by another of their hybrid offspring, the Asplenium azoricum, allotetraploid endemic to the Azores, the result of ancient hybridization between Asplenium anceps and other fern genus Asplenium.
The fronds of Asplenium anceps are between 5 and 30 centimeters in length. The leaflets are leathery, shiny and plastic, a characteristic they have inherited all their hybrid offspring, both his sons, Asplenium azoricum and Asplenium trichomanes ssp. maderense, as his grandson, Asplenium azomanes and his great-grandchildren, Asplenium x tubalense and Asplenium trichomanes nothosubsp. malacitense.
Underside of the same frond above. The petiole and rachis have a nice brown earth.
When Asplenium anceps grows in a brightly lit place their pinnae adopt a disposition in different levels as a roof. This feature can also be seen in their descendants, especially in his grandson, Asplenium azomanes.
In this picture you can see two parallel wings on the upper saddle, that run through its entire length.