9http://www. rsabg. org/herbarium/ferns/dryopteris/027_ D. fragrans. html;2008-07-08.
10Widen C J, Fraser-Jenkins C R,Reichstin T. et al. A survey of phenolic compounds in Dryopteris and related fern genera[J].Annales Botanici Fennici,2001,38(2): 99-1a8.