Burke: Polystichum imbricans vs. Polystichum andersonii

	Polystichum imbricans	Polystichum andersonii
	imbricate sword-fern, rock sword-fern	Anderson's sword fern, Vancouver holly fern

	Polystichum imbricans	Polystichum andersonii
Habitat	Drier habitats such as open rock crevices and dry conifer forest, occasionally on serpentine, mostly at low elevations.	Deep woods and thickets in the mountains.
Distribution	Occurring on both sides of the Cascades crest in Washington; southwestern British Columbia to California, eastern Idaho, and northern Idaho. [WildflowerSearch map] [BONAP county map]	Occurring chiefly west of the Cascades crest in Washington; southern Alaska to northern Oregon, northern Idaho, and northwest Montana. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	P. andersonii, P. braunii, P. californicum, P. californicum × P. munitum, P. kruckebergii, P. kruckebergii × P. munitum, P. lemmonii, P. lemmonii × P. munitum, P. lemmonii × P. scopulinum, P. lonchitis, P. munitum, P. munitum × P. scopulinum, P. scopulinum	P. braunii, P. californicum, P. californicum × P. munitum, P. imbricans, P. kruckebergii, P. kruckebergii × P. munitum, P. lemmonii, P. lemmonii × P. munitum, P. lemmonii × P. scopulinum, P. lonchitis, P. munitum, P. munitum × P. scopulinum, P. scopulinum
Subordinate taxa	P. imbricans ssp. imbricans
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search