Difference between revisions of "Equisetum ×mackaii"
Phytologist 1: 369. 1843 (Nov. 1842.
Basionym: Equisetum hyemale var. mackaii Newman Phytologist 1: 305. 1843 (Sept. 1842)
Synonyms: Equisetum hyemale subsp. trachyodon A.Braun Equisetum ×trachyodon Schleicher ex F. Weber & D. Mohr Equisetum variegatum var. jesupii A.A. Eaton
Treatment appears in FNA Volume 2.
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|habitat=Lakeshores, riverbanks, marshes | |habitat=Lakeshores, riverbanks, marshes | ||
|elevation=0–500 m | |elevation=0–500 m | ||
| − | |distribution=Greenland;B.C.;N.B.;Nfld.;Ont.;Que.;Sask.;Conn.;Ill.;Ind.;Maine;Mich.;Minn.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Vt.;Wis.;n Europe. | + | |distribution=Greenland;B.C.;N.B.;Nfld. and Labr. (Nfld.);Ont.;Que.;Sask.;Conn.;Ill.;Ind.;Maine;Mich.;Minn.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Vt.;Wis.;n Europe. |
|discussion=<p>The hybrid between <i>Equisetum hyemale</i> and <i>E. variegatum</i>, <i>E.</i> × <i>mackaii</i>, is often mistaken for small forms of <i>E. hyemale</i>. I have not seen specimens for the reports from Connecticut and New Hampshire.</p> | |discussion=<p>The hybrid between <i>Equisetum hyemale</i> and <i>E. variegatum</i>, <i>E.</i> × <i>mackaii</i>, is often mistaken for small forms of <i>E. hyemale</i>. I have not seen specimens for the reports from Connecticut and New Hampshire.</p> | ||
|tables= | |tables= | ||
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|habitat=Lakeshores, riverbanks, marshes | |habitat=Lakeshores, riverbanks, marshes | ||
|elevation=0–500 m | |elevation=0–500 m | ||
| − | |distribution=Greenland;B.C.;N.B.;Nfld.;Ont.;Que.;Sask.;Conn.;Ill.;Ind.;Maine;Mich.;Minn.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Vt.;Wis.;n Europe. | + | |distribution=Greenland;B.C.;N.B.;Nfld. and Labr. (Nfld.);Ont.;Que.;Sask.;Conn.;Ill.;Ind.;Maine;Mich.;Minn.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Vt.;Wis.;n Europe. |
|reference=None | |reference=None | ||
|publication title=Phytologist | |publication title=Phytologist | ||
|publication year=1842 | |publication year=1842 | ||
|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_531.xml |
|genus=Equisetum | |genus=Equisetum | ||
|subgenus=Equisetum subg. Equisetum | |subgenus=Equisetum subg. Equisetum | ||
Latest revision as of 20:24, 5 November 2020
Aerial stems persisting more than a year, unbranched, 20–86 cm; lines of stomates single; ridges 7–16. Sheaths black or black-girdled and white distally, appressed, elongate, 3.5–8 × 2–5.5 mm; teeth 7–16, centers dark, margins white, prominent, not articulate, tip usually brown, long, filiform. Cone apex pointed; spores white, misshapen.
Phenology: Cones maturing in late summer, but misshapen spores not shed.
Habitat: Lakeshores, riverbanks, marshes
Elevation: 0–500 m
Distribution
Greenland, B.C., N.B., Nfld. and Labr. (Nfld.), Ont., Que., Sask., Conn., Ill., Ind., Maine, Mich., Minn., Mont., N.H., N.J., N.Y., Ohio, Oreg., Vt., Wis., n Europe.
Discussion
The hybrid between Equisetum hyemale and E. variegatum, E. × mackaii, is often mistaken for small forms of E. hyemale. I have not seen specimens for the reports from Connecticut and New Hampshire.
Selected References
None.
Lower Taxa
None.