View source for Alnus incana subsp. rugosa

{{Treatment/ID
|accepted_name=Alnus incana subsp. rugosa
|accepted_authority=(Du Roi) R. T. Clausen
|publications={{Treatment/Publication
|title=Cornell Univ. Agric. Exp. Sta. Mem.
|place=291: 8. 1949
|year=1949
}}
|common_names=Speckled alder;tag alder;swamp alder;aulne blanchâtre
|special_status={{Treatment/ID/Special_status
|code=W1
|label=
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Betula alnus var. rugosa
|authority=Du Roi
|rank=variety
|publication_title=Diss. Observ. Bot.,
|publication_place=31. 1771
}}
|synonyms={{Treatment/ID/Synonym
|name=Alnus glauca
|authority=Michaux
|rank=species
}} {{Treatment/ID/Synonym
|name=Alnus incana var. americana
|authority=Regel
|rank=variety
}} {{Treatment/ID/Synonym
|name=Alnus rugosa var. americana
|authority=(Regel) Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Alnus rugosa var. rugosa
|authority=(Fernald) Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Alnus rugosa var. tomophylla
|authority=
|rank=variety
}}
|hierarchy=Betulaceae;Betulaceae subfam. Betuloideae;Alnus;Alnus incana;Alnus incana subsp. rugosa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Betulaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Betulaceae subfam. Betuloideae]]</div><div class="higher-taxon"><small>genus</small>[[Alnus]]</div><div class="higher-taxon"><small>species</small>[[Alnus incana]]</div><div class="higher-taxon"><small>subspecies</small>[[Alnus incana subsp. rugosa]]</div></div>
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> open, spreading, to 9 m. <b>Bark</b> dark grayish to reddish brown, smooth; lenticels whitish, prominent, horizontal. <b>Winter</b> buds parallel to twig, ellipsoid, 3–7 mm, apex acute or obtuse; stalks 2–4 mm. <b>Leaf</b> blade ovate to elliptic, 4–11 × 3–8 cm, firm, base cuneate to narrowly rounded, margins usually coarsely doubly serrate, toothed to base, apex acute or short-acuminate to slightly obtuse; surfaces abaxially often glaucous, glabrous to sparsely pubescent, often more densely so on veins, slightly to not noticeably resin-coated. <b>Inflorescences</b>: staminate catkins in 1 or more clusters of 2–4, 2–7 cm; pistillate catkins in 1 or more clusters of 2–6. <b>Infructescences</b> ovoid, 1–1.7 × 0.8–1.2 cm; peduncles 1–5 mm. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|phenology=Flowering early spring.
|habitat=Stream banks, lake shores, bogs, swamps, margins of wet fields, swales, and roadsides, often forming dense thickets
|elevation=0–800 m
|distribution=St. Pierre and Miquelon;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;Ill.;Ind.;Iowa;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Pa.;R.I.;Vt.;Va.;W.Va.;Wis.
|discussion=<p><i>Alnus incana </i>subsp.<i> rugosa</i> is an important shoreline and meadow colonizer in boreal and north temperate areas of the Canadian Shield, and a weedy successional species in damp areas along roadsides throughout its range. It overlaps in range and intergrades with <i>A. incana </i>subsp.<i> tenuifolia</i> to the west (in Saskatchewan and Manitoba) and with <i>A. serrulata</i> to the south. It is only slightly differentiated from the more treelike European <i>A. incana</i> subsp. incana.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Alnus incana subsp. rugosa
|authority=(Du Roi) R. T. Clausen
|rank=subspecies
|parent rank=species
|synonyms=Alnus glauca;Alnus incana var. americana;Alnus rugosa var. americana;Alnus rugosa var. rugosa;Alnus rugosa var. tomophylla
|basionyms=Betula alnus var. rugosa
|family=Betulaceae
|phenology=Flowering early spring.
|habitat=Stream banks, lake shores, bogs, swamps, margins of wet fields, swales, and roadsides, often forming dense thickets
|elevation=0–800 m
|distribution=St. Pierre and Miquelon;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;Ill.;Ind.;Iowa;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Pa.;R.I.;Vt.;Va.;W.Va.;Wis.
|reference=None
|publication title=Cornell Univ. Agric. Exp. Sta. Mem.
|publication year=1949
|special status=W1;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V3/V3_149.xml
|subfamily=Betulaceae subfam. Betuloideae
|genus=Alnus
|species=Alnus incana
|subspecies=Alnus incana subsp. rugosa
}}<!--

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