Treatment appears in FNA Volume 2. Treatment on page 117.
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Plants terrestrial or on rock. Stems compact or short-creeping, horizontal, solenostelic (having phloem on both sides of xylem) or dictyostelic (having complex nets of xylem), clothed with orange to reddish brown hairs. Leaves erect [rarely forming a flat rosette], partially to entirely dimorphic. Sporangia in 2 rows on ultimate segments of fertile pinnae, sessile, oblong; annulus apical. Spores tetrahedral-globose, with parallel or rarely anastomosing ridges. Gametophytes terrestrial, green, cordate with unequal lobes.


Widespread in tropical and subtropical regions.


Genera 2, species 119 (1 genus, 3 species in the flora).

Selected References


Lower Taxa