Difference between revisions of "Athyrium"
Tent. Fl. Germ. 3(1,1): 31, 58. 1799.
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--><p>Species about 180 (2 in the flora).</p> | --><p>Species about 180 (2 in the flora).</p> | ||
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| − | |references= | + | |references={{Treatment/Reference |
| + | |id=johnson1986c | ||
| + | |text=Johnson, D. M. 1986b. Trophopods in North American species of Athyrium (Aspleniaceae). Syst. Bot. 11: 26--31. | ||
| + | }}{{Treatment/Reference | ||
| + | |id=kato1977a | ||
| + | |text=Kato, M. 1977. Classification of Athyrium and allied genera of Japan. Bot. Mag. (Tokyo) 90: 23--40. | ||
| + | }}{{Treatment/Reference | ||
| + | |id=liew1972a | ||
| + | |text=Liew, F. S. 1972. Numerical taxonomic studies on North American lady ferns and their allies. Taiwania 17: 190--221. | ||
| + | }} | ||
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|family=Dryopteridaceae | |family=Dryopteridaceae | ||
|distribution=Worldwide. | |distribution=Worldwide. | ||
| − | |reference= | + | |reference=johnson1986c;kato1977a;liew1972a |
|publication title=Tent. Fl. Germ. | |publication title=Tent. Fl. Germ. | ||
|publication year=1799 | |publication year=1799 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_540.xml |
|genus=Athyrium | |genus=Athyrium | ||
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-->[[Category:Treatment]][[Category:Dryopteridaceae]] | -->[[Category:Treatment]][[Category:Dryopteridaceae]] | ||
Latest revision as of 20:24, 5 November 2020
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
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 |