Difference between revisions of "Athyrium"
Tent. Fl. Germ. 3(1,1): 31, 58. 1799.
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|family=Dryopteridaceae | |family=Dryopteridaceae | ||
|distribution=Worldwide. | |distribution=Worldwide. | ||
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|publication title=Tent. Fl. Germ. | |publication title=Tent. Fl. Germ. | ||
|publication year=1799 | |publication year=1799 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V2/V2_540.xml |
|genus=Athyrium | |genus=Athyrium | ||
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-->[[Category:Treatment]][[Category:Dryopteridaceae]] | -->[[Category:Treatment]][[Category:Dryopteridaceae]] | ||
Revision as of 19:48, 16 December 2019
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.
Distribution
Worldwide.
Discussion
In species outside the flora stems are sometimes long-creeping to erect, with leaves radially or dorsiventrally arranged.
Species about 180 (2 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Sori round, submarginal; indusia much reduced or usually absent. | Athyrium distentifolium var. americanum |
| 1 | Sori elongate or hooked, medial; indusia well developed. | Athyrium filix-femina |