Athyrium attenuatum (C.B.Clarke) Tagawa

Species

Pteridophytes > Polypodiales > Aspleniaceae > Athyrium

Characteristics

Rhizomes short, erect, apex densely clothed with red-brown, broadly lanceolate scales. Fronds caespitose; fertile fronds 35-60 cm; stipe upward stramineous, 5-17 cm, base ca. 2 mm in diam., similarly densely scaly, upward glabrate; lamina pinnate or 2-pinnate, lanceolate, up to 44 × 7-9 cm at middle, base gradually narrowed, apex acuminate; pinnae ca. 30 pairs, alternate, spreading, sessile, 7 or 8 pairs of lower pinnae gradually shortened, basal pinnae ca. 1.2 cm, apex obtuse, slightly reflexed; middle pinnae longest, linear-lanceolate, up to 4.5 × ca. 1 cm, base subtruncate, slightly widened, pinnatipartite almost to costae, apex acuminate; pinna segments ca. 14 pairs, subspreading, oblong, ca. 4.5 × 2.2 mm, basal segments slightly larger, connate to each other by narrow wing along costa, subentire at margin, apex obtuse and with 4 or 5 long teeth; veins visible abaxially, forked in segments. Lamina papery when dried, pale green, glabrate; rachis and costae stramineous abaxially, with very short subulate processes on adaxial side in upper part, squarrose-glandular hairs sparse abaxially. Sori oblong, basal acroscopic 2 or 3 pairs often horseshoe-shaped, 2 or 3 pairs per pinna segment; indusia brownish, oblong or horseshoe-shaped, membranous, erose at margin, persistent. Perispore surface without folds, with granular ornamentation. 2n = 80.
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Hardiness (USDA) 6-11

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Cultivation

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Distribution

Athyrium attenuatum world distribution map, present in Afghanistan, Bhutan, China, India, Myanmar, Nepal, and Pakistan

Identifiers

LSID urn:lsid:ipni.org:names:17372510-1
WFO ID wfo-0001118521
COL ID JFFQ
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Wikipedia (EN)
Wikipedia (FR)

Synonyms

Athyrium attenuatum f. intermedium Asplenium filix-femina f. dentigera Polypodium dentigerum Athyrium pseudofilix-femina Athyrium attenuatum f. dentigerum Athyrium excelsius Athyrium leiboense Athyrium dentigerum Athyrium ensiferum Athyrium attenuatum Asplenium filix-femina var. dentigera Athyrium filix-femina var. dentigera