OregonFlora: Polystichum imbricans vs. Polystichum imbricans ssp. imbricans

	Polystichum imbricans	Polystichum imbricans ssp. imbricans
	imbricate sword fern	imbricate sword fern
Stems		short; erect, with a crown of leaves.
Leaves		to 80 cm long; bulbils absent.
Petioles		well developed; up to 33% leaf length, with dense chaffy brown scales proximally, becoming smaller and sparse distally, largely absent from the rachis.
Blades		1-pinnate, narrowly lanceolate; to 70 × 8 cm, tapering to apex, not much reduced in width at base; microscales narrow, linear to lanceolate; abundant abaxially, absent above.
Pinnae		lanceolate to narrowly oblong; to 4 × 1 cm, usually overlapping and twisted out of plane; apex cuspidate; margins regularly dentate with forward-pointing spinetips, acroscopic auricle enlarged, broadly triangular or ovate, cuspidate; sinus mostly lacking but occasionally deep.
Sori		with irregularly lobed indusial margins.

	Polystichum imbricans	Polystichum imbricans ssp. imbricans
Distribution	[WildflowerSearch map] [BONAP county map]	[BONAP county map]
Discussion	[Species with one variety or subspecies in Oregon.]	On rocks and cliffs, frequently in sunny locations. 50– 2300 m. BW, Casc, Col, CR, ECas, Lava, Sisk, WV. CA, WA; north to British Columbia. Native.
Source	Flora of Oregon, volume 1	Flora of Oregon, volume 1, page 75 Duncan Thomas
Sibling taxa	P. andersonii, P. andersonii x Polystichum munitum, P. californicum, P. californicum x Polystichum munitum, P. kruckebergii, P. lemmonii, P. lonchitis, P. munitum, P. scopulinum
Subordinate taxa	P. imbricans ssp. imbricans
Synonyms		Polystichum munitum ssp. imbricans, Polystichum munitum var. 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, 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

Polystichum imbricans

Polystichum imbricans ssp. imbricans

imbricate sword fern

Stems

short; erect, with a crown of leaves.

Leaves

to 80 cm long; bulbils absent.

Petioles

well developed; up to 33% leaf length, with dense chaffy brown scales proximally, becoming smaller and sparse distally, largely absent from the rachis.

Blades

1-pinnate, narrowly lanceolate; to 70 × 8 cm, tapering to apex, not much reduced in width at base;

microscales narrow, linear to lanceolate; abundant abaxially, absent above.

Pinnae

lanceolate to narrowly oblong; to 4 × 1 cm, usually overlapping and twisted out of plane;

apex cuspidate;

margins regularly dentate with forward-pointing spinetips, acroscopic auricle enlarged, broadly triangular or ovate, cuspidate; sinus mostly lacking but occasionally deep.

Sori

with irregularly lobed indusial margins.