The World Flora Online

Plants terrestrial or epilithic, small to medium-sized, sometimes large. Rhizome long or shortly creeping, ascending or erect, rarely short treelike, dictyostelic, scaly; scales entire or toothed, tooth consisting of 2 adjacent upturned ends of marginal cells, basifixed, rarely pseudopeltate. Stipe supplied by 2 vascular strands with xylem seahorse-shaped in cross section and upward united into U-shaped strand, scaly, also hairy or glabrate, hairs unicellular or multicellular, glandular or eglandular. Rachis, costae, and costules grooved adaxially, grooves of costae and costules confluent to those of lower order frond axes or interrupted by ridges between grooves, scaly, hairy, or glabrate; hairs unicellular or multicellular, glandular or eglandular; spines continued from ridges, or short fleshy projections in grooves, at base of costae, costules, and midribs adaxially, or spines and projections absent. Lamina variously dissected, simple to 3-pinnate, pinnatifid or with terminal pinna similar to lateral pinnae, apex narrowed. Veins free or anastomosing with polygonal areoles or with successive veins from adjacent midribs united to excurrent veins between 2 rows of rhomboid areoles. Sori various, linear, J-shaped, horseshoe-shaped, orbicular-reniform, or orbicular, indusiate or exindusiate; indusia inferior entirely or proximally to receptacle, or lateral, various in shape, sack-shaped, cup-shaped, saucer-shaped, platelike, elongate, J-shaped, horseshoe-shaped, or orbicular-reniform. Spores bilateral, ellipsoid, covered by perispore.

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Rhizomes terrestrial, usually short, stout and suberect; scales not clathrate, with entire or toothed margins

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Fougères terrestres, à rhizome écailleux, écailles entières ou dentées, formées de cellules à parois minces. Pétiole présentant 2 cordons vasculaires, réunis en U au sommet. Rachis canaliculé au sommet, nu ou écailleux, ne portant pas de poils pluricellulaires. Limbe simple à bipenné. Costa canaliculé, les sillons des costulae interrompus à la jonction avec celui du costa. Nervures généralement libres. Sores arrondis, en J, ou en fer à cheval, indusie recourbée, rarement caduque . Sporanges à pied allongé, anneau ayant 14-16 cellules épaissies. Spores monolètes à périspore.

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