Blechnaceae, Blechnum

-pinnatifid/pinnately lobed

-oblong sori parallel to midrib with indusia

Blechnaceae, Woodwardia

-huge pinnate leaves with pinnatifid leaflets

-oblong sori in chain-like orientation on both sides of the midrib

Dryopteridaceae, Athyrium

Dryopteridaceae, Dryopteris

-reniform indusia

Dryopteridaceae, Polystichum

-leathery leaves

-peltate indusia

Equisetaceae, Equisetum

-hollow stems

-small leaves

Isoetaceae, Isoetes

-grass like leaves

Polypodiaceae, Polypodium

-pinnatifid

-round sori without indusia in one row on both sides of midrib

Pteridaceae, Adiantum

Pteridaceae, Cheilanthes

-hairs, scales and glands on lower surface

-leaf blades 2-3 pinnate

Pteridaceae, Pellaea

-glabrous lower leaf surface

Pteridaceae, Adiantum