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Family: dryopteridaceae
Common name(s): Hard shield fern
Hardiness ratings: USDA zone 3~4 - 8 
General resources
Links for Polystichum aculeatum
- BBC Gardening - Plant profile with horticultural details and garden uses.
 (1 photo)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-8) (2 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 3)
- Garden.org - Community-assembled plant profile (2 photos)
- Plant Delights Nursery - Catalog page with photo, horticultural basics, and descriptive blurb. (1 photo)
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