Athyrium Roth

Derivation uncertain, possibly from the Greek athurein - variable; referring to the variability of the sorus; alternatively from the Greek athoros - meaning good at breeding.

Rhizomes erect, branched, thick, with a dense covering of scales, occasionally forming short trunks. Sterile and fertile fronds similar. Fronds tufted, divided 2-3 times, scaly, deciduous, groove on upper surface of midrib and branches; veins free. Sori extending along one side of a vein and sometimes passing over it. Indusia attached to vein on one side and opening towards the midrib, 'j' shaped, 'u' shaped or round.

c. 500-600 species, cosmopolitan.

Spores or division.

Groove of midrib and branches open and continuous.

Source: Spencer, R. (1995). Athyriaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 1, Ferns, conifers & their allies. The identification of garden and cultivated plants. University of New South Wales Press.

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kingdom Plantae
phylum   Tracheophyta
class    Polypodiopsida
order     Polypodiales
family      Woodsiaceae
Higher taxa
Subordinate taxa
species        Athyrium filix-femina (L.) Roth
species        Athyrium niponicum (Mett.) Hance