Polystichum ningshenense Ching & Y.P.Hsu

Species

Pteridophytes > Polypodiales > Dryopteridaceae > Dryopteridoideae > Polystichum

Characteristics

Plants evergreen. Rhizome erect or ascending, short, densely covered with linear brown scales. Fronds 50-70 cm; stipe yellowish brown, 25-40 cm, 4-5 mm in diam. at base, sparsely covered with linear, lanceolate, light brown scales and larger scales; large scales light brown and bicolorous, ovate and ovate-lanceolate; bicolorous scales sparse, castaneous at middle, shiny, up to 13 × 5 mm, with sparse irregular teeth or subentire, caudate. Lamina bipinnate, oblong, 30-40 × 20-25 cm at middle, gradually contracted toward base, lower part sterile, apex acuminate, fertile; rachis without proliferous bulbils, abaxially sparsely or densely covered with linear, lanceolate, light brown scales and larger scales; large scales dense, ovate-lanceolate and broadly lanceolate, up to 9 × 3.5 mm, with dense small teeth, long acuminate to caudate. Pinnae 20-28 pairs, alternate, attached at right angles to rachis, shortly stalked, lanceolate, bases asymmetrical, apices acuminate; middle pinnae 11-12 × 2.2-2.6 cm, 1-pinnate; costa narrowly winged, adaxially sulcate, abaxially covered with linear, subulate, brown scales. Pinnules 9-14 pairs, alternate, subsessile, oblong, 1-1.4 cm × 5-7 mm, bases cuneate and decurrent, acroscopic margins entire or subentire, shortly and finely spinulose, with rounded auricles, indistinct, basiscopic margins finely long spinulose, apices acute with acute tips; basal acroscopic pinnules largest, sometimes incised; both surfaces densely covered with long-filiform light brown microscales; frond texture thinly papery; venation pinnate, lateral veins 5-7 pairs, dichotomous, distinct. Sori (1 or)3-5 pairs per pinnule, in 1 row on each side of midrib, close to margins, terminal on veinlets; indusia present, entire.
Life form perennial
Growth form herb
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Foliage retention evergreen
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Usage

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Cultivation

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Distribution

Polystichum ningshenense world distribution map, present in China

Identifiers

LSID urn:lsid:ipni.org:names:17549340-1
WFO ID wfo-0001127325
COL ID 4LN3S
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Polystichum ningshenense