Grammitidaceae (C.Presl) Ching
Sori round to elongate (coenosori), exindusiate, superficial to partly immersed, dorsal. Sporangia with or without paraphyses; annulus vertical, incomplete, dehiscing by transverse slit; spores tetrahedral. Rhizome creeping or condensed, solenostelic, with paleae, sts with hairs. Stipes with single vascular strand. Fronds simple to pinnatifid or pinnate; veins free or with occ. anastomoses. Prothallus cordate. About 10 genera of wide distribution, but generic limits much disputed.
