Difference between revisions of "Ophioglossum pusillum"
Précis Découv. Somiol. 46. 1814.
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|common_names=Northern adder's-tongue;herbe-sans-couture | |common_names=Northern adder's-tongue;herbe-sans-couture | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
| + | }}{{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Ophioglossum vulgatum var. pseudopodum | |name=Ophioglossum vulgatum var. pseudopodum | ||
|authority=(S.F. Blake) Farwell | |authority=(S.F. Blake) Farwell | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Ophioglossaceae;Ophioglossum;Ophioglossum pusillum | |hierarchy=Ophioglossaceae;Ophioglossum;Ophioglossum pusillum | ||
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name=Ophioglossum pusillum | name=Ophioglossum pusillum | ||
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|authority=Rafinesque | |authority=Rafinesque | ||
|rank=species | |rank=species | ||
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|publication title=Précis Découv. Somiol. | |publication title=Précis Découv. Somiol. | ||
|publication year=1814 | |publication year=1814 | ||
| − | |special status= | + | |special status=Illustrated;Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_323.xml |
|genus=Ophioglossum | |genus=Ophioglossum | ||
|species=Ophioglossum pusillum | |species=Ophioglossum pusillum | ||
Latest revision as of 21:22, 5 November 2020
Roots yellow to tan, to 15 per plant, 0.3-1 mm diam., producing proliferations. Stem upright, to 2 cm, 3mm diam., 1 leaf per stem. Trophophore stalk expanding gradually into blade. Trophophore 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. Sporophores 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. 2n =960.
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
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.
Selected References
None.