View source for Betula michauxii

{{Treatment/ID
|accepted_name=Betula michauxii
|accepted_authority=Spach
|publications={{Treatment/Publication
|title=Ann. Sci. Nat., Bot., sér.
|place=2, 15: 195. 1841
|year=1841
}}
|common_names=Newfoundland dwarf birch;Michaux's birch;bouleau de Michaux
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Betula terra-novae
|authority=Fernald
}}
|hierarchy=Betulaceae;Betulaceae subfam. Betuloideae;Betula;Betula michauxii
|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 michauxii]]</div></div>
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="shrub orientation;shrub size;shrub some measurement"><b>Shrubs,</b> spreading, dwarfed, to ca. 0.5 m.</span> <span class="statement" id="st-d0_s1" data-properties="bark coloration;bark architecture or pubescence or relief;bark arrangement"><b>Bark </b>dark-brown, smooth, close;</span> <span class="statement" id="st-d0_s2" data-properties="lenticel coloration;lenticel prominence;lenticel arrangement or shape">lenticels pale, inconspicuous, circular.</span> <span class="statement" id="st-d0_s3" data-properties="gland duration or odor or taste;gland pubescence;gland coating;gland size;gland pubescence or relief;gland coating"><b>Twigs </b>without taste and odor of wintergreen, moderately to densely pubescent, not conspicuously resin-coated, without large, warty, resinous glands.</span> <span class="statement" id="st-d0_s4" data-properties="leaf-blade shape;leaf-blade length;leaf-blade width;pair quantity;base shape;margin architecture or shape;apex shape;apex shape;apex shape"><b>Leaf-</b>blade obovate–reniform, with 2–3 pairs of lateral-veins, 0.5–1 × 0.5–1.2 cm, base cuneate, margins deeply crenate-dentate, apex broadly rounded to nearly truncate;</span> <span class="statement" id="st-d0_s5" data-properties="surface pubescence">surfaces abaxially usually glabrous.</span> <span class="statement" id="st-d0_s6" data-properties="infructescence orientation;infructescence shape;infructescence length;infructescence width"><b>Infructescences </b>erect, short-cylindric, 0.5–1 × 0.5–0.8 cm, shattering with fruits in fall;</span> <span class="statement" id="st-d0_s7" data-properties="scale shape;scale pubescence">scales unlobed (lateral lobes sometimes present but greatly reduced), glabrous.</span> <span class="statement" id="st-d0_s8" data-properties="wing prominence;wing prominence"><b>Samaras </b>with wings not apparent or reduced to narrow ridges.</span><!--

-->{{Treatment/Body
|phenology=Flowering late spring.
|habitat=Sphagnum bogs, around pools, and wet peaty meadows
|elevation=0–700 m
|distribution=St. Pierre and Miquelon;Nfld.;N.S.;Que.
|discussion=<p>This infrequent dwarf birch is distinguished from Betula nana mostly on the basis of its reduced infructescence scales and wetter habitat (J. J. Furlow 1984), characteristics that are also occasionally noted in B. nana. It perhaps might better be treated as a race of that species; in the absence of thorough study of this complex, however, it seems best to follow the traditional treatment (M. L. Fernald 1950c; J. Rousseau and M. Raymond 1950).</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Betula michauxii
|author=
|authority=Spach
|rank=species
|parent rank=genus
|synonyms=Betula terra-novae
|basionyms=
|family=Betulaceae
|phenology=Flowering late spring.
|habitat=Sphagnum bogs, around pools, and wet peaty meadows
|elevation=0–700 m
|distribution=St. Pierre and Miquelon;Nfld.;N.S.;Que.
|reference=None
|publication title=Ann. Sci. Nat., Bot., sér.
|publication year=1841
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V3/V3_120.xml
|subfamily=Betulaceae subfam. Betuloideae
|genus=Betula
|species=Betula michauxii
|apex shape=broadly rounded;nearly truncate
|bark architecture or pubescence or relief=smooth
|bark arrangement=close
|bark coloration=dark-brown
|base shape=cuneate
|gland coating=resinous;resin-coated
|gland duration or odor or taste=wintergreen
|gland pubescence=pubescent
|gland pubescence or relief=warty
|gland size=large
|infructescence length=0.5cm;1cm
|infructescence orientation=erect
|infructescence shape=short-cylindric
|infructescence width=0.5cm;0.8cm
|leaf-blade length=0.5cm;1cm
|leaf-blade shape=obovate-reniform
|leaf-blade width=0.5cm;1.2cm
|lenticel arrangement or shape=circular
|lenticel coloration=pale
|lenticel prominence=inconspicuous
|margin architecture or shape=crenate-dentate
|pair quantity=2;3
|scale pubescence=glabrous
|scale shape=unlobed
|shrub orientation=spreading
|shrub size=dwarfed
|shrub some measurement=0m;0.5m
|surface pubescence=glabrous
|wing prominence=reduced to narrow;not apparent
}}<!--

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