Dennstaedtiaceae (weeds)

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Pteridium aquilinum infestation (click on image to enlarge it)
Source: Wikimedia Commons

Dennstaedtiaceae (weeds) - (bracken fern family)

This fern family contains more than 200 species. They are widely distributed and most are terrestrial, although some climb over other vegetation. Several species are important invasive weeds, especially from the genus Pteridium like Pteridium aquilinum. These persist in the invaded areas due to their extensive rhizomes and are poisonous to livestock. The large leaf blades are usually 2 or 3 times divided (2-3 pinnate) and hairy. The sori (spore producing structures) are typically located close to the leaf margins.

The following genera and individual species are currently entered under this family: