Polystichum aculeatum (L.) Roth, 1799

Common names

  • 🇬🇧 Hard Shield-fern 1
  • 🇫🇷 Polystic à aiguillons, Polystic à frondes munies d’aiguillons 1

Taxonomy

  • Kingdom: Plantae
  • Clade: Tracheophytes
  • Division: Polypodiophyta
  • Class: Polypodiopsida
  • Order: Polypodiales
  • Suborder: Polypodiineae
  • Family: Dryopteridaceae
  • Subfamily: Dryopteridoideae
  • Genus: Polystichum
  • Species: Polystichum aculeatum

Conservation status

  • Red List (Metropolitan France): Least Concern (LC) 1
  • Red List (Europe): Least Concern (LC) 2

Notes

Possible confusion with Polystichum setiferum (Forssk.) T.Moore ex Woyn., 1913 which has petiolules and auricles at the base of every pinule.

Possible confusion of young specimens with Polystichum lonchitis (L.) Roth, 1799.

Photographs

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Polystichum aculeatum
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Polystichum aculeatum
img/polystichum-aculeatum-9.webp
Polystichum aculeatum
img/polystichum-aculeatum-10.webp
Polystichum aculeatum
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Polystichum aculeatum - Frond details
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Polystichum aculeatum - Frond details
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Polystichum aculeatum - Abaxial side with sori visible
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Polystichum aculeatum - Young specimen
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Polystichum aculeatum - Specimen with an unusually forked frond
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Polystichum aculeatum - Specimen with an unusually forked frond

  1. MNHN & OFB [Ed]. 2003-2023. Sheet of Polystichum aculeatum (L.) Roth, 1799. Inventaire national du patrimoine naturel (INPN). Website: https://inpn.mnhn.fr/espece/cd_nom/115041 - November 12, 2023 ↩︎ ↩︎ ↩︎

  2. Christenhusz, M., Bento Elias, R., Dyer, R., Ivanenko, Y., Rouhan, G., Rumsey, F. & Väre, H. 2017. Polystichum aculeatum (Europe assessment). The IUCN Red List of Threatened Species 2017: e.T83650852A85427195. Accessed on 12 November 2023. ↩︎