Northeastern Asian Flora
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Polystichum thomsonii (J.D.Hook.) Bedd.   (redirected from: Dryopteris thomsonii (Hook.f.) Kuntze)
Family: Dryopteridaceae
[Aspidium capillipes Baker, moreAspidium thomsonii Hook., Dryopteris inaensis Tagawa, Dryopteris thomsonii (Hook.f.) Kuntze, Polystichum capillipes (Baker) Diels, Polystichum inaense (Tagawa) Tagawa, Polystichum longidens Ching & S.K.Wu, Polystichum michelii Christ, Polystichum minusculum Christ, Polystichum molliculum Christ]
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  • Japan Flora
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Japan Flora: Rhizomes short; stipes spreading, slender, 1-4 cm. long, pale green, the scales brown, narrowly lanceolate to linear, about 2 mm. long, entire; blades thinly herbaceous, lanceolate to linear-lanceolate, 3-7 cm. long, 8-12 mm. wide, acute, slightly narrowed at base, simply pin­nate, the rachis slender, green, with brown linear scales; pinnae 12-17 pairs, spreading, ovate, acute with a mucro at the tip, broadly cuneate at base, with scattered short linear scales on both sides, coarsely mucronate-toothed, the lower ones usually pinnately parted to lobed; sori 1 to few on a pinna, between the costa and the margin; indusia membranous, orbicular- reniform, about 1 mm. across, deeply erose-dentate.  Rocks in high mountains.

Honshu (s. Shinano Prov. and w. Mu- sashi Prov.); very rare.

Polystichum thomsonii
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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