Arachniodes nipponica (Rosenst.) Ohwi

Species

Pteridophytes > Polypodiales > Dryopteridaceae > Dryopteridoideae > Arachniodes

Characteristics

Rhizome creeping, succulent at growing apex, 1-2.5 cm in diam., densely scaly; scales pale or reddish brown, ovate-lanceolate or lanceolate, to 7 × 1-2.5 mm, apically attenuate, thin and soft. Fronds remote or proximate, 0.7-1.5 m; stipe ochraceous or amber, 36-75 cm, 4-8 mm in diam., base scaly as rhizome, upward scales diminishing to glabrescent; lamina 3(or 4)-pinnate, lustrous yellowish green when dried, oblong-lanceolate or ovate-oblong, 40-75 × 25-45 cm, often thickly papery and flexible, base rounded-cuneate, apex acuminate or slightly attenuate, rachis glabrescent; pinnae 6-8(-10) pairs, alternate or lowest 1 or 2 pairs opposite, with to 2 cm stalk, obliquely spreading; lowest pinnae deltoid-lanceolate, 18-35 × ca. 10 cm, base rounded-cuneate, apex acuminate; primary pinnules 12-17 pairs, proximal ones with to 8 mm stalk, lanceolate, (basal basiscopic one 6-8 × 2-3 cm), base rounded-cuneate, apex acuminate, larger fronds with proximal 1-3 pairs of primary pinnules 2-pinnate; secondary pinnules shortly stalked or sessile, oblong, ca. 1.5 × 0.7 cm, base cuneate, apex acute, margin sharply dentate or pinnatifid, with mucronate teeth; upper pinnae gradually reduced; axes and veins of ultimate segments with brown, appressed, articulate hairs, and with a few minute brown ovate-based or linear scales abaxially. Sori terminal on veinlets, 2 or 3 pairs per ultimate segment, medial between midvein and margin; indusia pale brown, membranous, and entire.
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality -
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Root system rhizome
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Nitrogen fixer -
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Environment

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Hardiness (USDA) 7-9

Usage

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Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

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Distribution

Arachniodes nipponica world distribution map, present in China and Japan

Identifiers

LSID urn:lsid:ipni.org:names:17427800-1
WFO ID wfo-0001116825
COL ID G32P
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Byrsopteris nipponica Arachniodes anshunensis Arachniodes gongshanensis Polystichum nipponicum Arachniodes nipponica Rumohra nipponica Polystichopsis nipponica