Asplenium trichomanes subsp. coriaceifolium

It lives among the stones of the walls of the terraces and in the crevices of limestone rocks oriented to the north and northwest. Depending on the degree of exposure to the sun, its phenotype changes a lot, becoming more coriaceous the more sunlight it receives. In the driest months of summer comes into estivation, dehydrating their fronds, reaching apparently dead. With the first rains of autumn, the fern rehydrate the dried fronds and turn green quickly. ==Distribution==

Its population is distributed in three locations separated by the Mediterranean Sea: the Balearic Islands (Mallorca, Ibiza and Formentera), south of the Iberian Peninsula (Albacete, Jaen, Malaga and Cadiz) and the north of Morocco (from Chefchaouen in Western Rif until the rocks surrounding the Caves of Chameau in Mountains of Beni Snassen). ==Hybrids==

• Asplenium × tubalense (Asplenium trichomanes nothosubsp. barreraense): allotetraploid hybrid between Asplenium trichomanes subsp. coriaceifolium and Asplenium trichomanes subsp. quadrivalens. • Asplenium trichomanes nothosubsp. malacitense: hexaploid hybrid between Asplenium trichomanes subsp. coriaceifolium and Asplenium trichomanes subsp. inexpectans. ==References==