Northeastern Asian Flora
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Athyrium distentifolium Tausch ex Opiz   (redirected from: Dryopteris incrassata (Christ) C.Chr.)
Family: Aspleniaceae
[Aspidium alpestre Hoppe, moreAthyrium alpestre (Hoppe) Clairv., Athyrium dissitifolium var. funebre (Christ) Ching, Athyrium drepanopterum var. funebre Christ, Dryopteris apicidens (Baker) C.Chr., Dryopteris dissitifolia (Baker) C.Chr., Dryopteris incrassata (Christ) C.Chr., Phegopteris incrassata Christ, Polypodium apicidens Baker, Polypodium dissitifolium Baker, Pseudathyrium alpestre (Hoppe) Newman]
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  • Japan Flora
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Japan Flora: Rhizomes short, rather stout; fronds erect, tnfted, 50-70 cm. long, glabrous, sparsely scaly while very young; stipes 20-30 cm. long, pale green to slightly reddish, more densely scaly toward base; scales membranous, brown, unequal, linear to broadly lanceolate, 7- 12(15) mm. long, 1-4 mm. wide, en­tire; blades herbaceous, oblong or narrowly oblong-ovate, sometimes narrowly ovate, 30-40 cm. long, 12니 8 cm. wide, short-acuminate, slightly narrowed at base, bipinnate, the rachis and pinnae beneath scaly while young; pinnae 8-10 pairs, the lower ones somewhat interrupted and subopposite, broadly lanceolate, 6-10 cm. long, 2-3 cm. wide, acumi­nate, sessile, ascending to spreading; pinnules narrowly ovate, 1-2 cm. long, 5-8 mm. wide, acute, usually broadly cuneate at base, sessile, pinnately cleft to parted, the segments elliptic, obtuse, mucronate-toothed; sori solitary on the lower veinlets of the pinnules.  Alpine slopes. 

Hokkaido, Honshu (centr. distr.); locally abundant. Kamchatka, Siberia to Europe, and N. America.

Athyrium distentifolium
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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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