Acystopteris taiwaniana (Tagawa) Á.Löve & D.Löve

Species

Pteridophytes > Polypodiales > Cystopteridaceae > Acystopteris

Characteristics

Rhizome creeping, 2-4 mm in diam., with sparse yellowish brown, broadly lanceolate, thinly membranous scales. Fronds approximate; fertile frond 35-80 cm; stipe chestnut-brown, dull brown, or sometimes stramineous, 15-40 cm, 1-4 mm in diam., grooved adaxially, with sparse scales at base, upward glabrate, shiny or dull; rachis except upper part chestnut-brown; lamina 2-or 3-pinnate, broadly ovate to deltoid-ovate, 18-45 × 12-25 cm, herbaceous or thickly herbaceous, not narrowed to base, base subcordate or truncate, apex shortly acuminate or acuminate; pinnae 10-15 pairs, opposite or subopposite, 3-8 cm apart, spreading or ascending, subsessile or very shortly stalked, basal pair not shorter, oblong or broadly lanceolate; upper pinnae lanceolate, 8-18 × 3-6 cm, base subtruncate, apex acuminate; pinnules 10-15 pairs, sessile, alternate, subequilateral, basiscopic pinnules slightly longer than acroscopic pinnules, basal pair slightly shorter, subopposite, oblong, 0.5-2.5 × 1.5-6 mm, base truncate or broadly cuneate, apex obtuse; costae stramineous or brown; pinnule segments 7-12 pairs, spreading or slightly ascending, oblong, crenate, apex obtuse; veins pinnate in segment, simple, reaching marginal teeth. Orange or yellow small glands borne on abaxial surface and at indusium margin, hyaline multicellular long hairs present on veins, costules, costae, rachis, and stipe. Sori orbicular, abaxial on basal acroscopic veins; indusia small, pale green, broadly ovate, membranous, proximal to sorophore, hidden by sori at maturity, persistent. Spores normal. 2n = 82*.
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Cultivation

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Distribution

Acystopteris taiwaniana world distribution map, present in China and Taiwan, Province of China

Identifiers

LSID urn:lsid:ipni.org:names:17553650-1
WFO ID wfo-0001128845
COL ID 9WS2
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Wikipedia (EN)
Wikipedia (FR)

Synonyms

Acystopteris taiwaniana Acystopteris japonica var. taiwaniana Cystopteris japonica var. taiwaniana