Hard shield fern Polystic à aiguillons Gelappter Schildfarn Gelappte Schëldfar Class: Pteridopsida Family: Dryopteridaceae Status LRlc – lower risk least concern Suggested citation of this webpageKrippel, Y., 2019. Polystichum aculeatum (L.) Roth. In: Online atlas of the pteridophytes of Luxembourg. URL: https://pteridophytes.lu/polystichum-aculeatum/ [22.08.2019].