Flora of New Zealand Series

Sori submarginal, terminal on veinlets, sts united into coenosori. Indusium attached at base, opening towards lamina margin, sides attached or free. Lamina margin protective, sts thin and indusium-like. Sporangia stalked, dehiscing by transverse slit; annulus incomplete, vertical; spores 32-64, tetrahedral, without perispore. Rhizome slender, bearing narrow paleae, us. protostelic; stipes not jointed to rhizome. Fronds simple to dissected; veinlets free or sts anastomosing; lamina margin thickened and decurrent. About 9 genera, mainly terrestrial, of wide distribution.