Aspleniaceae

The Aspleniaceae (spleenworts) are a family of ferns, included in the order Polypodiales. The family has a worldwide distribution, with many species in both temperate and tropical areas. Elongated unpaired sori are an important characteristic of most members of the family. The Aspleniaceae have a worldwide distribution, with the large genus Asplenium being native to almost all parts of the world except Antarctica and some high Arctic areas. The family is unusual in having high diversity in both temperate and tropical areas, and more-or-less equal numbers of terrestrial and epiphytic species. Plants are terrestrial, growing in the ground, lithophytic, growing on rocks, or epiphytic, growing on other plants; less often they are aquatic, growing in moving water. Read more on Wikipedia.