View source for Betula pubescens subsp. pubescens

{{Treatment/ID
|accepted_name=Betula pubescens subsp. pubescens
|accepted_authority=unknown
|publications=
|common_names=European white birch;downy birch
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}
|basionyms=
|synonyms=
|hierarchy=Betulaceae;Betulaceae subfam. Betuloideae;Betula;Betula pubescens;Betula pubescens subsp. pubescens
|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>[[Betula]]</div><div class="higher-taxon"><small>species</small>[[Betula pubescens]]</div><div class="higher-taxon"><small>subspecies</small>[[Betula pubescens subsp. pubescens]]</div></div>
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Trees,</b> narrow, to 20 m; trunk usually 1, branches ascending or spreading. <b>Twigs</b> usually without conspicuous resinous glands. <b>Leaf</b> blade broadly ovate to rhomic-ovate, 3–4(–6) × 2–4(–6) cm, base rounded, truncate, or cuneate, margins finely to coarsely toothed or dentate, apex acute; surfaces abaxially moderately pubescent to velutinous, especially along major veins and in vein axils. <b>Fruiting</b> catkins 2–3 × 0.8–1.2 cm; scales puberulent and ciliate, lobes diverging at middle, central lobes ovate to delatate, apex acute to obtuse, lateral lobes divergent, about equal in length, several times broader. <b>Samaras</b> with wings somewhat broader than body, broadest near summit, extended beyond body apically. <b>2n</b> = 56.</span><!--

-->{{Treatment/Body
|phenology=Flowering late spring.
|habitat=Rocky slopes, scrubs, heaths, and open woods where native, elsewhere in abandoned plantings, moist open roadsides, swales, swampy thickets
|elevation=0–200 m
|distribution=B.C.;Conn.;Ind.;Maine;Mass.;N.H.;Ohio;Pa.;Vt.;native to Europe.
|discussion=<p><i>Betula pubescens </i>subsp.<i> pubescens</i> is commonly cultivated in northeastern North America, where it has sometimes escaped and persisted, or become adventive but not widely naturalized. It is distinguished from other light-barked species in the East by its relatively small leaves, pubescent twigs, and brownish, mostly unpeeling bark.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Betula pubescens subsp. pubescens
|author=
|authority=unknown
|rank=subspecies
|parent rank=species
|synonyms=
|basionyms=
|family=Betulaceae
|phenology=Flowering late spring.
|habitat=Rocky slopes, scrubs, heaths, and open woods where native, elsewhere in abandoned plantings, moist open roadsides, swales, swampy thickets
|elevation=0–200 m
|distribution=B.C.;Conn.;Ind.;Maine;Mass.;N.H.;Ohio;Pa.;Vt.;native to Europe.
|introduced=true
|reference=None
|publication title=
|publication year=
|special status=Introduced
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V3/V3_327.xml
|subfamily=Betulaceae subfam. Betuloideae
|genus=Betula
|species=Betula pubescens
|subspecies=Betula pubescens subsp. pubescens
}}<!--

-->[[Category:Treatment]][[Category:Betula pubescens]]