The Sword Ferns of Mt. Adams
The Genus Polystichum (Dryopteridaceae)
A clear example of the term crevice plants: imbricate sword fern (Polystichum imbricans) and lace lip fern (Cheilanthes gracillima) as seen on a rock face along the Round the Mt. Trail #9 in the Mt. Adams Wilderness......................September 5, 2008.
Imbricate Sword Fern: Polystichum
imbricans ssp. imbricans
Kruckeberg's Sword Fern: Polystichum kruckebergii
Northern Holly Fern: Polystichum
lonchitis
Western Sword Fern: Polystichum
munitum
Mountain Hollyfern: Polystichum scopulinum