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Family Dennstaedtiaceae

Description: Terrestrial ferns; rhizome creeping (rarely erect), covered with simple hairs or, less commonly, multicellular hairs or scales; stipes not articulated to the rhizome.

Fronds uniform or ± dimorphic; lamina mostly large and much-divided, leathery or herbaceous, hairy or glabrous; veins free or loosely anastomosing.

Sori marginal or submarginal, circular or linear; false indusium usually present (mostly with an inner true indusium present as well) or occasionally sori unprotected. A somewhat heterogeneous family.


Distribution and occurrence: World: 11 or 12 genera, c. 190 species, tropical to temperate regions. Australia: 5 genera, 14 species, all States.

External links:
Wikipedia

Text by Peter G. Wilson
Taxon concept:

 Key to the genera 
1Sori circular, often in the fork between the lobes of ultimate segments2
Sori linear, marginal, covered by false indusia formed from recurved margins of the segments3
2Indusium cup-like with the outer, false, indusium fused to the inner indusiumDennstaedtia
Indusium false or absent, sori protected by recurved marginal flap or if sori away from margin then unprotected
                       Back to 1
Hypolepis
3Fronds tough and leathery, veins free; rhizome covered with hairsPteridium
Fronds soft and membranous, veins loosely anastomosing; rhizome covered with scales and/or hairs
                       Back to 1
Histiopteris

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