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Traits of Azolleceae (Salviniales)
Fan shaped, two lobed leaves; floating
Roots pendant and stems forked; submerged
Heterosporous
What families are in the order Salviniales?
Azolleceae
What families are in the order Polypodiales?
Dennstaedtiaceae
Pteridaceae: Adiantum
Dryopteridaceae
Polypodiaceae
Blechnaceae
Athyriaceae
Traits of Dennstaedtiaceae (Polypodiales)
Petiole strongly grooved on upper surface
Rhizome and base of petiole covered in felt-like hairs
False indusium
Traits of Pteridaceae
Wiry, thin, dark petioles
False indusia
May have nom-aggregated sporangis
May have dissimilar vegetative and reproductive leaves
Traits of Dryopteridaceae
Sporangia in round sori
Indusia ventrally attached
Traits of Polypodiaceae
Leaves simple and deeply pinnately lobed
No indusia on sori
Traits of Blechnaceae
Leaves deeply pinnately lobed or once pinnately compound with lobed leaflets
Oblong sori in end to end rows with laterally attached oblong indusia
Traits of Aythriaceae
1-3 pinnate blades
Sori with either no indusia or reniform indusia laterally attached