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Screw fern
	Screw fern at Ferndale Park, Chatswood West, Australia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Family:	Lindsaeaceae
Genus:	Lindsaea
Species:	L. linearis
Binomial name
	Lindsaea linearis; Sw.
Synonyms
	Adiantum lineare (Sw.) Poir.; Lindsaea trilobata Colenso; Lindsaea lunata Willd.; Lindsaya linearis orth. var. F.Muell.;

Lindsaea linearis is known as the screw fern, as the fronds may have a twisting appearance. A small fern of widespread distribution in many parts of Australia. Found in a variety of habitats, often near swamps or moist places. By rocks, heathland or open forest.^[1] It has a dark stem, unlike the similar necklace fern, which is green.

The screw fern was first described by Swedish botanist Olof Swartz in 1801, and still bears its original name.^[2]

References

^ "Lindsaea linearis". PlantNET - NSW Flora Online. Retrieved 2010-07-18.
^ "Lindsaea linearis Sw". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.