shield fern
noun
1- any of a number of ferns that have circular shield-like scales protecting the spore cases鳞毛蕨, 耳蕨：
1.1
- a European fern of damp woodland (genus Polystichum, family Dryopteridaceae).耳蕨（耳蕨属, 鳞毛蕨科）。
1.2
- N. Amer. an evergreen fern (genus Thelypteris, family Thelypteridaceae).〈北美〉沼泽蕨（沼泽蕨属, 金星蕨科）。
1.3
- Austral. a fern of forested country (family Aspidiaceae).〈澳〉三叉蕨（三叉蕨科）。