View source for Athyrium

{{Treatment/ID
|accepted_name=Athyrium
|accepted_authority=Roth
|publications={{Treatment/Publication
|title=Tent. Fl. Germ.
|place=3(1,1): 31, 58. 1799
|year=1799
}}
|common_names=Lady fern
|basionyms=
|synonyms=
|hierarchy=Dryopteridaceae;Athyrium
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dryopteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Athyrium]]</div></div>
|etymology=Greek athyros, doorless; the sporangia only tardily push back the outer edge of the indusium
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>generally terrestrial. <b>Stems</b> short-creeping or ascending, stolons absent. <b>Leaves</b> monomorphic, usually dying back in winter. <b>Petiole</b> ± 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. <b>Blade</b> lanceolate to elliptic or oblanceolate, 1–3-pinnate-pinnatifid, gradually reduced distally to confluent, pinnatifid apex, herbaceous. <b>Pinnae</b> 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. <b>Veins</b> free, simple or forked. <b>Sori</b> 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. <b>Spores</b> brownish, rugose. <b>x</b> = 40.</span><!--

-->{{Treatment/Body
|distribution=Worldwide.
|discussion=<p>In species outside the flora stems are sometimes long-creeping to erect, with leaves radially or dorsiventrally arranged.</p><!--
--><p>Species about 180 (2 in the flora).</p>
|tables=
|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.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Sori round, submarginal; indusia much reduced or usually absent.
|[[Athyrium distentifolium var. americanum|Athyrium distentifolium var. americanum]]
|-id=key-0-1
|1
|Sori elongate or hooked, medial; indusia well developed.
|[[Athyrium filix-femina|Athyrium filix-femina]]
|}
</div></div><!--

-->{{#Taxon:
name=Athyrium
|author=Masahiro Kato
|authority=Roth
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Dryopteridaceae
|distribution=Worldwide.
|reference=johnson1986c;kato1977a;liew1972a
|publication title=Tent. Fl. Germ.
|publication year=1799
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_540.xml
|genus=Athyrium
}}<!--

-->[[Category:Treatment]][[Category:Dryopteridaceae]]