Polystichum imbricans |
Polystichum imbricans ssp. imbricans |
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imbricate sword fern |
imbricate sword fern |
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Stems | short; erect, with a crown of leaves. |
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Leaves | to 80 cm long; bulbils absent. |
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Petioles | well developed; up to 33% leaf length, with dense chaffy brown scales proximally, becoming smaller and sparse distally, largely absent from the rachis. |
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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. |
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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. |
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Sori | with irregularly lobed indusial margins. |
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Polystichum imbricans |
Polystichum imbricans ssp. imbricans |
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Distribution | ||
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 | ||
Subordinate taxa | ||
Synonyms | Polystichum munitum ssp. imbricans, Polystichum munitum var. imbricans | |
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