Polystichum rigens Tagawa

Stiff holly fern (en)

Species

Pteridophytes > Polypodiales > Dryopteridaceae > Dryopteridoideae > Polystichum

Characteristics

Plants evergreen. Rhizome erect, stout, densely scaly; scales brown or dark brown, lanceolate. Fronds 40-60 cm; stipe stramineous, 14-30 cm, 3-5 mm in diam. at base, densely scaly; scales brown to dark brown, ovate and lanceolate. Lamina bipinnatipartite, ovate to narrowly oblong, 26-50 × 11-16 cm, rounded-cuneate or nearly truncate, acuminate; rachis without proliferous bulbils, abaxially densely scaly; scales light brown or brown, ovate and lanceolate, margins ciliate, not twisted. Pinnae 14-23 pairs, alternate, slightly ascendant or attached at right angles to rachis, linear-lanceolate, sometimes falcate, middle pairs 6-11 × 1.5-2.5 cm, obliquely cordate or rounded-cuneate, shortly stalked, pinnatipartite with 1 or 2 pairs of basal free pinnules, acuminate. Pinnules and lobes 10-15 pairs, alternate, ascendant, narrowly ovate or deltoid-ovate, basal acroscopic lobes largest, 1-2 cm × 5-6 mm, bases rounded, margins with spinulose forward-pointing teeth, apices acuminate and spinulose; abaxially scaly; microscales filiform, strongly ciliate at base; frond texture leathery; venation pinnate on pinnules and lobes, slightly concave abaxially, flat or slightly concave adaxially. Sori in 1 row on each side of midrib; indusia present, subentire.
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality -
Pollination -
Spread -
Mature width (meter) 0.1 - 0.5
Mature height (meter) 0.1 - 0.5
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 1-9
Soil humidity -
Soil texture -
Soil acidity 2-6
Soil nutriment -
Hardiness (USDA) 7-10

Usage

Uses environmental use
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by divisions.
Mode divisions
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Polystichum rigens unspecified picture

Distribution

Polystichum rigens world distribution map, present in China, Japan, and Korea (Democratic People's Republic of)

Identifiers

LSID urn:lsid:ipni.org:names:17414530-1
WFO ID wfo-0001117072
COL ID 4LN82
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR) Link

Synonyms

Polystichum rigens Polystichum platychlamys