Difference between revisions of "Betula nana"

Linnaeus

Sp. Pl. 2: 983. 1753.

Common names: Arctic dwarf birch bouleau nain
Treatment appears in FNA Volume 3.
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FNA>Volume Importer
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--><span class="statement" id="st-d0_s0" data-properties="shrub growth form or orientation;shrub orientation;shrub orientation;shrub orientation;shrub orientation;shrub some measurement"><b>Shrubs,</b> sprawling, creeping, or upright, to 1 m.</span> <span class="statement" id="st-d0_s1" data-properties="bark coloration;bark coloration;bark coloration;bark architecture or pubescence or relief;bark arrangement"><b>Bark </b>gray to dark-brown, smooth, close;</span> <span class="statement" id="st-d0_s2" data-properties="lenticel prominence;lenticel size">lenticels inconspicuous, unexpanded.</span> <span class="statement" id="st-d0_s3" data-properties="twig odor;twig odor;twig odor;twig odor;gland pubescence or relief;gland coating"><b>Twigs </b>without taste and odor of wintergreen, glabrous to sparsely or moderately pubescent, with or without heavy resinous coating, sometimes covered with warty resinous glands.</span> <span class="statement" id="st-d0_s4" data-properties="leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade width;pair quantity;base shape;base shape;base shape;margin shape;apex shape"><b>Leaf-</b>blade broadly orbiculate or obovate-orbiculate to reniform, with 2–6 pairs of lateral-veins, often broader than long, base rounded to nearly cordate, margins deeply crenate, apex rounded;</span> <span class="statement" id="st-d0_s5" data-properties="">surfaces abaxially glabrous to sparsely or moderately pubescent.</span> <span class="statement" id="st-d0_s6" data-properties="surface pubescence;surface pubescence;surface pubescence;surface pubescence;surface architecture;catkin architecture;catkin size;growth life cycle"><b>Staminate </b>and pistillate catkins produced season before flowering but retained in buds during winter, expanding along with new growth in spring.</span> <span class="statement" id="st-d0_s7" data-properties="infructescence orientation;infructescence shape"><b>Infructescences </b>erect, nearly cylindric, shattering with fruits in fall.</span> <span class="statement" id="st-d0_s8" data-properties="samara width;samara width;samara size;wing width"><b>Samaras </b>with wings much narrower than body, broadest near center, not extended beyond body apically.</span><!--
+
--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> sprawling, creeping, or upright, to 1 m. <b>Bark</b> gray to dark brown, smooth, close; lenticels inconspicuous, unexpanded. <b>Twigs</b> without taste and odor of wintergreen, glabrous to sparsely or moderately pubescent, with or without heavy resinous coating, sometimes covered with warty resinous glands. <b>Leaf</b> blade broadly orbiculate or obovate-orbiculate to reniform, with 2–6 pairs of lateral veins, often broader than long, base rounded to nearly cordate, margins deeply crenate, apex rounded; surfaces abaxially glabrous to sparsely or moderately pubescent. <b>Staminate</b> and pistillate catkins produced season before flowering but retained in buds during winter, expanding along with new growth in spring. <b>Infructescences</b> erect, nearly cylindric, shattering with fruits in fall. <b>Samaras</b> with wings much narrower than body, broadest near center, not extended beyond body apically.</span><!--
  
 
-->{{Treatment/Body
 
-->{{Treatment/Body
|distribution=Subarctic and arctic of North America;Europe;and Asia
+
|distribution=Subarctic and arctic of North America;Europe;and Asia.
 
|discussion=<p>Subspecies 3 (2 in the flora).</p>
 
|discussion=<p>Subspecies 3 (2 in the flora).</p>
 
|tables=
 
|tables=
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|basionyms=
 
|basionyms=
 
|family=Betulaceae
 
|family=Betulaceae
|distribution=Subarctic and arctic of North America;Europe;and Asia
+
|distribution=Subarctic and arctic of North America;Europe;and Asia.
 
|reference=None
 
|reference=None
 
|publication title=Sp. Pl.
 
|publication title=Sp. Pl.
 
|publication year=1753
 
|publication year=1753
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V3/V3_802.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_802.xml
 
|subfamily=Betulaceae subfam. Betuloideae
 
|subfamily=Betulaceae subfam. Betuloideae
 
|genus=Betula
 
|genus=Betula
 
|species=Betula nana
 
|species=Betula nana
|apex shape=rounded
 
|bark architecture or pubescence or relief=smooth
 
|bark arrangement=close
 
|bark coloration=gray;dark-brown
 
|base shape=rounded;nearly cordate
 
|catkin architecture=pistillate
 
|catkin size=expanding
 
|gland coating=resinous
 
|gland pubescence or relief=warty
 
|growth life cycle=new
 
|infructescence orientation=erect
 
|infructescence shape=cylindric
 
|leaf-blade shape=obovate-orbiculate;reniform
 
|leaf-blade width=often broader than long
 
|lenticel prominence=inconspicuous
 
|lenticel size=unexpanded
 
|margin shape=crenate
 
|pair quantity=2;6
 
|samara size=not extended
 
|samara width=broadest;much narrower
 
|shrub growth form or orientation=sprawling
 
|shrub orientation=upright;creeping;upright;creeping
 
|shrub some measurement=0m;1m
 
|surface architecture=staminate
 
|surface pubescence=abaxially glabrous;sparsely or moderately pubescent
 
|twig odor=glabrous;sparsely or moderately pubescent
 
|wing width=much narrower
 
 
}}<!--
 
}}<!--
  
 
-->[[Category:Treatment]][[Category:Betula]]
 
-->[[Category:Treatment]][[Category:Betula]]

Revision as of 13:50, 27 July 2019

Shrubs, sprawling, creeping, or upright, to 1 m. Bark gray to dark brown, smooth, close; lenticels inconspicuous, unexpanded. Twigs without taste and odor of wintergreen, glabrous to sparsely or moderately pubescent, with or without heavy resinous coating, sometimes covered with warty resinous glands. Leaf blade broadly orbiculate or obovate-orbiculate to reniform, with 2–6 pairs of lateral veins, often broader than long, base rounded to nearly cordate, margins deeply crenate, apex rounded; surfaces abaxially glabrous to sparsely or moderately pubescent. Staminate and pistillate catkins produced season before flowering but retained in buds during winter, expanding along with new growth in spring. Infructescences erect, nearly cylindric, shattering with fruits in fall. Samaras with wings much narrower than body, broadest near center, not extended beyond body apically.

Distribution

Subarctic and arctic of North America, Europe, and Asia.

Discussion

Subspecies 3 (2 in the flora).

Selected References

None.

Key

1 Young twigs pubescent, not covered with conspicuous resinous layer; subarctic and arctic ne Canada, s Greenland. Betula nana subsp. nana
1 Young twigs glabrous or only puberulent, covered with thick resinous coating; Alaska, Yukon, n Asia. Betula nana subsp. exilis