View source for Ophioglossum pusillum

{{Treatment/ID
|accepted_name=Ophioglossum pusillum
|accepted_authority=Rafinesque
|publications={{Treatment/Publication
|title=Précis Découv. Somiol.
|place=46. 1814
|year=1814
}}
|common_names=Northern adder's-tongue;herbe-sans-couture
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Ophioglossum vulgatum var. pseudopodum
|authority=(S.F. Blake) Farwell
}}
|hierarchy=Ophioglossaceae;Ophioglossum;Ophioglossum pusillum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Ophioglossaceae]]</div><div class="higher-taxon"><small>genus</small>[[Ophioglossum]]</div><div class="higher-taxon"><small>species</small>[[Ophioglossum pusillum]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>yellow to tan, to 15 per plant, 0.3-1 mm diam., producing proliferations. <b>Stem</b> upright, to 2 cm, 3mm diam., 1 leaf per stem. <b>Trophophore</b> stalk expanding gradually into blade. <b>Trophophore</b> blade erect or spreading, usually plane when alive, pale green, dull, mostly oblanceolate to obovate to ovate, widest point in middle, to 10 × 3.5 cm, soft, herbaceous, base tapering gradually, apex rounded; venation complex-reticulate, with included free veinlets in areoles. <b>Sporophores</b> arising at ground level, 2.5-4.5 times length of trophophore; sporangial clusters 20-45 × 1-4 mm, with 10-40 pairs of sporangia, apiculum 1-2 mm. <b>2n</b> =960.</span><!--

-->{{Treatment/Body
|phenology=Leaves appearing midspring.
|habitat=Frequent and widespread, open fens, marsh edges, pastures, and grassy shores and roadside ditches, north of the southern boundary of Wisconsin glaciation
|elevation=100-2000 m
|distribution=B.C.;N.B.;N.S.;Ont.;Que.;Alaska;Calif.;Conn.;Idaho;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Nebr.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Oreg.;Pa.;R.I.;S.Dak.;Vt.;Va.;Wash.;W.Va.;Wis.
|discussion=<p>Ophioglossum pusillum is inconspicuous and may be much more common than collections indicate. It differs from O. vulgatum in having an ephemeral, membranous basal sheath.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Ophioglossum pusillum
|author=
|authority=Rafinesque
|rank=species
|parent rank=genus
|synonyms=Ophioglossum vulgatum var. pseudopodum
|basionyms=
|family=Ophioglossaceae
|phenology=Leaves appearing midspring.
|habitat=Frequent and widespread, open fens, marsh edges, pastures, and grassy shores and roadside ditches, north of the southern boundary of Wisconsin glaciation
|elevation=100-2000 m
|distribution=B.C.;N.B.;N.S.;Ont.;Que.;Alaska;Calif.;Conn.;Idaho;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Nebr.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Oreg.;Pa.;R.I.;S.Dak.;Vt.;Va.;Wash.;W.Va.;Wis.
|reference=None
|publication title=Précis Découv. Somiol.
|publication year=1814
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_323.xml
|genus=Ophioglossum
|species=Ophioglossum pusillum
}}<!--

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