Northeastern Asian Flora
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Arachniodes amabilis (Blume) Tindale  
Family: Dryopteridaceae
[Arachniodes amabilis var. fimbriata K.Iwats., moreArachniodes amabilis var. okinawensis (Nakaike) Seriz., Arachniodes okinawensis Nakaike, Arachniodes rhomboidea (Schott) Ching, Arachniodes rhomboidea var. yakusimensis (H.Ito) W.C.Shieh, Aspidium amabile Blume, Aspidium controversum Hance, Aspidium rhomboideum (Schott) Wall. ex Mett., Byrsopteris amabilis (Blume) C.V.Morton, Dryopteris amabilis (Blume) Kuntze, Polystichopsis amabilis (Blume) Tagawa, Polystichum amabile var. chinensis Rosenst., Polystichum rhomboideum Schott, Rumohra amabilis (Blume) Ching, Rumohra amabilis var. yakushimensis H.Ito, Rumohra amabilis var. yakusimensis H.It?]
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  • Japan Flora
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Japan Flora: Rhizomes short-creeping; stipes approximate, 20-40 cm. long, often slightly rubescent; scales on rhizomes and at base of stipes dense, membranous, reddish brown, lanceolate, 8-10 mm. long, to 2 mm. wide, gradually narrowed to a filiform tip, entire, scales on stipes and rachis filiform, deciduous,2-5 mm. long; blades ovate to broadly so, 25-45 cm. long, 15-25 cm. wide, simply pinnate or more often with a pinnate branch on posterior side in the lowest (or lower 2) pairs, the pinnae 2-7 pairs, lanceolate, 12-20 cm. long, 2-3.5 cm. wide, acumi­nate, petiolulate; terminal pinnae acuminate, short-petiolulate; pinnules firmly chartaceous to subcoriaceous, deltoid-ovate to oblong-ovate, 1.5-3 cm. long, 8-12 mm. wide, oblique, short- petiolulate, subacute, spine-tipped and -toothed, slightly lus­trous above, glabrate on both sides; sori submarginal, in 2 ser­ies on the pinnules, nearer the margin than the costule; indusia orbicular-reniform, 1-1.5 mm. across,ciliate, sparsely puberu- lent on back.  

Honshu (Kanto Distr. and westw.), Shikoku, Kyushu.Ryukyus, Formosa, China to Malaysia, and India.

var. yakusimensis (H. Ito) Ohwi. Fronds nar­rower, 45-60 cm. long; pinnae 7-9 pairs, the pinnules smaller, coriaceous, often lobed to parted, 7-15 mm. long; indusia not ciliate. Honshu (Kii Prov.), Shikoku, Kyushu. Ryukyus, Formosa, and China

Arachniodes amabilis
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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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