View source for Equisetum ×mackaii

{{Treatment/ID
|accepted_name=Equisetum ×mackaii
|accepted_authority=(Newman) Brichan
|publications={{Treatment/Publication
|title=Phytologist
|place=1: 369. 1843 (Nov. 1842
|year=1842
}}
|basionyms={{Treatment/ID/Basionym
|name=Equisetum hyemale var. mackaii
|authority=Newman
|publication_title=Phytologist
|publication_place=1: 305. 1843 (Sept. 1842)
}}
|synonyms={{Treatment/ID/Synonym
|name=Equisetum hyemale subsp. trachyodon
|authority=A.Braun
}} {{Treatment/ID/Synonym
|name=Equisetum ×trachyodon
|authority=Schleicher ex F. Weber & D. Mohr
}} {{Treatment/ID/Synonym
|name=Equisetum variegatum var. jesupii
|authority=A.A. Eaton
}}
|hierarchy=Equisetaceae;Equisetum;Equisetum subg. Equisetum;Equisetum ×mackaii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Equisetaceae]]</div><div class="higher-taxon"><small>genus</small>[[Equisetum]]</div><div class="higher-taxon"><small>subgenus</small>[[Equisetum subg. Equisetum]]</div><div class="higher-taxon"><small>species</small>[[Equisetum ×mackaii]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Aerial </b>stems persisting more than a year, unbranched, 20–86 cm; lines of stomates single; ridges 7–16. <b>Sheaths</b> 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. <b>Cone</b> apex pointed; spores white, misshapen.</span><!--

-->{{Treatment/Body
|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.;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>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Equisetum ×mackaii
|author=
|authority=(Newman) Brichan
|rank=species
|parent rank=subgenus
|synonyms=Equisetum hyemale subsp. trachyodon;Equisetum ×trachyodon;Equisetum variegatum var. jesupii
|basionyms=Equisetum hyemale var. mackaii
|family=Equisetaceae
|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.;Ont.;Que.;Sask.;Conn.;Ill.;Ind.;Maine;Mich.;Minn.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Vt.;Wis.;n Europe.
|reference=None
|publication title=Phytologist
|publication year=1842
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V2/V2_531.xml
|genus=Equisetum
|subgenus=Equisetum subg. Equisetum
|species=Equisetum ×mackaii
}}<!--

-->[[Category:Treatment]][[Category:Equisetum subg. Equisetum]]