Difference between revisions of "Betula nana subsp. nana"

unknown
Common names: Arctic dwarf birch
Treatment appears in FNA Volume 3.
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--><span class="statement" id="st-d0_s0" data-properties="shrub growth form;shrub orientation;shrub orientation;shrub orientation;shrub orientation;shrub some measurement"><b>Shrubs,</b> procumbent, widely spreading, or upright, to 1 m.</span> <span class="statement" id="st-d0_s1" data-properties="bark coloration"><b>Bark </b>dark-brown.</span> <span class="statement" id="st-d0_s2" data-properties="twig pubescence;twig reflectance;heavy coating;gland size;gland pubescence or relief;gland coating"><b>Twigs </b>sparsely to densely pubescent, dull, without heavy resinous coating, without large, warty, resinous glands.</span> <span class="statement" id="st-d0_s3" data-properties="leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade length;leaf-blade width;base shape;base shape;base shape;base shape"><b>Leaf-</b>blade broadly orbiculate or obovate-orbiculate to reniform, 0.8–1.5 × 0.8–2 cm, base rounded or cuneate to nearly cordate;</span> <span class="statement" id="st-d0_s4" data-properties="surface pubescence;surface pubescence;surface pubescence">surfaces abaxially sparsely pubescent to glabrous.</span> <span class="statement" id="st-d0_s5" data-properties="infructescence length;infructescence width"><b>Infructescences </b>0.5–1.5 × 0.4–1 cm;</span> <span class="statement" id="st-d0_s6" data-properties="scale pubescence">scales glabrous, lobes diverging distal to middle, ascending, about equal in length.</span> <span class="statement" id="st-d0_s7" data-properties="lobe position;lobe position;lobe position;lobe position;lobe orientation;lobe length;2n chromosome quantity">2n = 28.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> procumbent, widely spreading, or upright, to 1 m. <b>Bark</b> dark brown. <b>Twigs</b> sparsely to densely pubescent, dull, without heavy resinous coating, without large, warty, resinous glands. <b>Leaf</b> blade broadly orbiculate or obovate-orbiculate to reniform, 0.8–1.5 × 0.8–2 cm, base rounded or cuneate to nearly cordate; surfaces abaxially sparsely pubescent to glabrous. <b>Infructescences</b> 0.5–1.5 × 0.4–1 cm; scales glabrous, lobes diverging distal to middle, ascending, about equal in length. <b>2n</b> = 28.</span><!--
  
 
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|habitat=Tundra, open rocky barrens, and scrubs, in Europe subalpine mountain moors
 
|habitat=Tundra, open rocky barrens, and scrubs, in Europe subalpine mountain moors
 
|elevation=0–600 m
 
|elevation=0–600 m
|distribution=Greenland;N.W.T.;n Europe
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|distribution=Greenland;N.W.T.;n Europe.
 
|discussion=<p>Betula nana subsp. nana occurs in both eastern and western Greenland at latitudes north of 63 degrees. In Europe, the range of this subspecies extends across the subarctic zone and southward in the Alps and other ranges.</p>
 
|discussion=<p>Betula nana subsp. nana occurs in both eastern and western Greenland at latitudes north of 63 degrees. In Europe, the range of this subspecies extends across the subarctic zone and southward in the Alps and other ranges.</p>
 
|tables=
 
|tables=
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|habitat=Tundra, open rocky barrens, and scrubs, in Europe subalpine mountain moors
 
|habitat=Tundra, open rocky barrens, and scrubs, in Europe subalpine mountain moors
 
|elevation=0–600 m
 
|elevation=0–600 m
|distribution=Greenland;N.W.T.;n Europe
+
|distribution=Greenland;N.W.T.;n Europe.
 
|reference=None
 
|reference=None
 
|publication title=
 
|publication title=
 
|publication year=
 
|publication year=
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V3/V3_763.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_763.xml
 
|subfamily=Betulaceae subfam. Betuloideae
 
|subfamily=Betulaceae subfam. Betuloideae
 
|genus=Betula
 
|genus=Betula
 
|species=Betula nana
 
|species=Betula nana
 
|subspecies=Betula nana subsp. nana
 
|subspecies=Betula nana subsp. nana
|2n chromosome quantity=28
 
|bark coloration=dark-brown
 
|base shape=cuneate;nearly cordate
 
|gland coating=resinous
 
|gland pubescence or relief=warty
 
|gland size=large
 
|heavy coating=resinous
 
|infructescence length=0.5cm;1.5cm
 
|infructescence width=0.4cm;1cm
 
|leaf-blade length=0.8cm;1.5cm
 
|leaf-blade shape=obovate-orbiculate;reniform
 
|leaf-blade width=0.8cm;2cm
 
|lobe length=equal
 
|lobe orientation=ascending
 
|lobe position=distal;middle
 
|scale pubescence=glabrous
 
|shrub growth form=procumbent
 
|shrub orientation=upright;spreading;upright;spreading
 
|shrub some measurement=0m;1m
 
|surface pubescence=abaxially sparsely pubescent;glabrous
 
|twig pubescence=pubescent
 
|twig reflectance=dull
 
 
}}<!--
 
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-->[[Category:Treatment]][[Category:Betula nana]]
 
-->[[Category:Treatment]][[Category:Betula nana]]

Revision as of 13:49, 27 July 2019

Shrubs, procumbent, widely spreading, or upright, to 1 m. Bark dark brown. Twigs sparsely to densely pubescent, dull, without heavy resinous coating, without large, warty, resinous glands. Leaf blade broadly orbiculate or obovate-orbiculate to reniform, 0.8–1.5 × 0.8–2 cm, base rounded or cuneate to nearly cordate; surfaces abaxially sparsely pubescent to glabrous. Infructescences 0.5–1.5 × 0.4–1 cm; scales glabrous, lobes diverging distal to middle, ascending, about equal in length. 2n = 28.


Phenology: Flowering late spring.
Habitat: Tundra, open rocky barrens, and scrubs, in Europe subalpine mountain moors
Elevation: 0–600 m

Distribution

V3 763-distribution-map.gif

Greenland, N.W.T., n Europe.

Discussion

Betula nana subsp. nana occurs in both eastern and western Greenland at latitudes north of 63 degrees. In Europe, the range of this subspecies extends across the subarctic zone and southward in the Alps and other ranges.

Selected References

None.

Lower Taxa

None.