Polystichum Roth. Holly Fern.
A genus of about 500 species, nearly cosmopolitan in distribution.
Ref: Kramer & Green (1990); Wagner (1993) In Flora of North America Editorial Committee (1993b); Zhang & Barrington (2013). Show full citations.
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© Bruce A. Sorrie | 
© Alan Cressler: Polystichum munitum, Tryon Creek State Natural Area, Capital Hill, Multnomah County, Oregon 2 by Alan Cressler | Polystichum munitum source | Original Image ⭷
© Keith Bradley | 
© Erik Danielson | 
© Alan Cressler: Polystichum braunii, with Cystopteris bulbifera, and Dryopteris intermedia , Laughing Whitefish Falls Scenic Site, Alger County, Michigan 1 by Alan Cressler | Polystichum braunii source | Original Image ⭷
© Alan Cressler: Polystichum munitum, Rain Forest Resort Village, Quinault Rain Forest, Grays Harbor County, Washington 1 by Alan Cressler | Polystichum munitum source | Original Image ⭷