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Athyrium
Family: Athyriaceae
Athyrium image
  • FNA
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Masahiro Kato in Flora of North America (vol. 2)
Plants generally terrestrial. Stems short-creeping or ascending, stolons absent. Leaves monomorphic, usually dying back in winter. Petiole ± 0.5 times length of blade or less, base swollen and dentate, persisting as trophopod over winter or not; vascular bundles 2, lateral, lunate in cross section. Blade lanceolate to elliptic or oblanceolate, 1--3-pinnate-pinnatifid, gradually reduced distally to confluent, pinnatifid apex, herbaceous. Pinnae not articulate to rachis, segment margins serrulate or crenate; proximal pinnae often reduced, sessile to short-petiolulate, ± equilateral; costae adaxially grooved, grooves continuous from rachis to costae to costules; indument absent or of linear to lanceolate scales or 1-celled glands abaxially. Veins free, simple or forked. Sori in 1 row between midrib and margin, round to elongate, straight or hooked at distal end, or horseshoe-shaped; indusia shaped like sori, persistent, attached laterally or with narrow sinus, or indusia absent. Spores brownish, rugose. x = 40. In species outside the flora stems are sometimes long-creeping to erect, with leaves radially or dorsiventrally arranged.

Vascular plants of NE US and adjacent Canada
Petiole stramineous, stout, with 2 bundles at the base, these uniting upwardly into a single trough-shaped bundle; blade pinnate to tripinnate, sparingly scaly, otherwise glabrous or sparsely hairy; veins free, simple or forked, reaching the margin; indusia borne on the anterior side of the vein, often recurved and crossing the vein and thus hooked or horseshoe-shaped, rarely back to back, subentire or toothed, often ciliate; large wood-ferns with thick, creeping to suberect rhizomes and thin, light green, deciduous lvs, the rhizome and often also the petioles with conspicuous, entire, fibrous scales; rhizome in our spp. beset with old swollen, starch-filled petiole-bases. 150+, cosmop.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Show all taxa || << 1 - 50 taxa >>
Athyrium alpestre
Image of Athyrium alpestre
Athyrium americanum
Image of Athyrium americanum
Athyrium amoenum
Image of Athyrium amoenum
Athyrium amplissimum
Image of Athyrium amplissimum
Athyrium anisopterum
Image of Athyrium anisopterum
Athyrium arcuatum
Image of Athyrium arcuatum
Athyrium arisanense
Image of Athyrium arisanense
Athyrium asplenioides
Image of Athyrium asplenioides
Athyrium asplenoides
Image of Athyrium asplenoides
Athyrium atkinsonii
Image of Athyrium atkinsonii
Athyrium baldwinii
Image of Athyrium baldwinii
Athyrium banajaoense
Image of Athyrium banajaoense
Athyrium bourgaei
Image of Athyrium bourgaei
Athyrium brevifrons
Image of Athyrium brevifrons
Athyrium clarkei
Image of Athyrium clarkei
Athyrium clivicola
Image of Athyrium clivicola
Athyrium cryptogrammoides
Image of Athyrium cryptogrammoides
Athyrium cyclosorum
Image of Athyrium cyclosorum
Athyrium delavayi
Image of Athyrium delavayi
Athyrium delicatulum
Image of Athyrium delicatulum
Athyrium deltoidofrons
Image of Athyrium deltoidofrons
Athyrium devolii
Image of Athyrium devolii
Athyrium dissitifolium
Image of Athyrium dissitifolium
Athyrium distans
Image of Athyrium distans
Athyrium distentifolium
Image of Athyrium distentifolium
Athyrium dombei
Image of Athyrium dombei
Athyrium dombeyi
Image of Athyrium dombeyi
Athyrium drepanopterum
Image of Athyrium drepanopterum
Athyrium dubium
Image of Athyrium dubium
Athyrium epirachis
Image of Athyrium epirachis
Athyrium erythropodum
Image of Athyrium erythropodum
Athyrium esculentum
Image of Athyrium esculentum
Athyrium expansum
Image of Athyrium expansum
Athyrium falcatum
Image of Athyrium falcatum
Athyrium fallaciosum
Image of Athyrium fallaciosum
Athyrium fenzlianum
Images
not available
Athyrium ferulaceum
Image of Athyrium ferulaceum
Athyrium filix-femina
Image of Athyrium filix-femina
Athyrium fragile
Image of Athyrium fragile
Athyrium goeringianum
Image of Athyrium goeringianum
Athyrium grammitoides
Image of Athyrium grammitoides
Athyrium hakonense
Image of Athyrium hakonense
Athyrium haleakalae
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not available
Athyrium hohenackerianum
Image of Athyrium hohenackerianum
Athyrium iseanum
Image of Athyrium iseanum
Athyrium kaalaanum
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not available
Athyrium lanceum
Image of Athyrium lanceum
Athyrium leiopodum
Image of Athyrium leiopodum
Athyrium macraei
Image of Athyrium macraei
Athyrium macrocarpum
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not available
The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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