Rusty-back fern Cétérach officinal Milzfarn, Schriftfarn Schrëftfar Class: Pteridopsida Family: Aspleniaceae Status VU – vulnerable Suggested citation of this webpageKrippel, Y., 2019. Ceterach officinarum Willd. In: Online atlas of the pteridophytes of Luxembourg. URL: https://pteridophytes.lu/ceterach-officinarum/ [22.08.2019].