Northeastern Asian Flora
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Polystichum tripteron (Kunze) C.Presl  
Family: Dryopteridaceae
[Aspidium tripteron Kunze, moreDryopteris triptera (Kunze) O.Kunze, Polystichum subpinnatum Kodama ex Mori, Polystichum subtripteron Tzvelev, Polystichum tripteron f. pedatiforme Akasawa, Polystichum tripteron f. simplicissimum (Tagawa) Tagawa, Polystichum tripteron f. subbipinnatum H.Ito, Polystichum tripteron f. subpinnatum H.It, Polystichum tripteron var. simplicissimum Tagawa, Polystichum tripteron var. subpinnata (Kodama) Honda, Ptilopteris triptera , Ptilopteris triptera var. subpinnata (Kodama) Nakai]
Polystichum tripteron image
Chin Sung Chang
  • Japan Flora
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Japan Flora: Rhi­zomes erect to ascending, clothed with the basal stubs of old stipes; fronds tufted; stipes erect, 10-40 cm. long, pale green, brownish at base, loosely scaly, the scales membranous, brown, entire, long-filiform at the tip, the larger ones broadly lanceo­late to oblong, 7-15 mm. long, evanescent on upper part of stipe, persistent at base, smaller ones ovate, 3-5 mm. long; blades simply pinnate in upper part, lanceolate, 20-45 cm. long, 5-10 cm. wide, acuminate, the rachis pale green, sparsely scaly, bipinnate in the lowest pinnae; pinnae 20-35 on each side, herbaceous, lanceolate, 2.5-5 cm. long, 5-12 mm. wide, often falcate toward the acuminate tip or straight, strongly oblique on anterior side at base, ascending-toothed, ending in a soft slender awnlike tip, sometimes lobulate, glabrous above, with scattered thin scales beneath; pinnules 8-15 pairs, smaller than the pinnae; sori in 2(-4) series on the pinnules, between the costule and the margin or slightly nearer the costule; in­dusia membranous, orbicular, erose. Woods in mountains.

Hokkaido, Honshu, Shikoku, Kyushu; common. s. Kuriles, Korea, China to e. Siberia.

Polystichum tripteron
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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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