Difference between revisions of "Betulaceae subfam. Betuloideae"

Koehne

Deut. Dendrol. 106, 1893 (as Betulae).

Treatment appears in FNA Volume 3.
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--><span class="statement" id="st-d0_s0" data-properties="trunk shape;branch shape"><b>Trunks </b>and branches terete.</span> <span class="statement" id="st-d0_s1" data-properties="bark width;bark arrangement;bark relief;bark architecture;bark condition or fragility;sheet width;sheet width"><b>Bark </b>thin, close or exfoliating in thin sheets, becoming thicker and frequently furrowed or broken in age;</span> <span class="statement" id="st-d0_s2" data-properties="lenticel presence;lenticel prominence;lenticel size">lenticels often present, prominent, sometimes becoming greatly expanded horizontally.</span> <span class="statement" id="st-d0_s3" data-properties="bark architecture;wood architecture"><b>Bark </b>and wood strongly tanniferous.</span> <span class="statement" id="st-d0_s4" data-properties="twig life cycle;bud life cycle;gland size;gland size;gland size;gland coating"><b>Young </b>twigs and buds often covered with small to large, resinous glands;</span> <span class="statement" id="st-d0_s5" data-properties="pith shape">pith triangular in cross-section.</span> <span class="statement" id="st-d0_s6" data-properties="leaf arrangement;leaf arrangement"><b>Leaves </b>3-ranked, occasionally nearly 2-ranked.</span> <span class="statement" id="st-d0_s7" data-properties="flower architecture;perianth prominence;perianth size;perianth texture;sepal atypical quantity;sepal quantity"><b>Staminate </b>flowers: perianth of 4 (–6) sepals, well defined, minute, membranaceous.</span> <span class="statement" id="st-d0_s8" data-properties="flower architecture;flower quantity;scale arrangement;catkin shape"><b>Pistillate </b>flowers 2–3 per scale, scales arranged in conelike catkins;</span> <span class="statement" id="st-d0_s9" data-properties="perianth prominence">perianth not obvious;</span> <span class="statement" id="st-d0_s10" data-properties="integument quantity">ovules with 1 integument.</span> <span class="statement" id="st-d0_s11" data-properties="infructescence some measurement;infructescence shape;scale quantity"><b>Infructescences </b>1–4 cm, conelike, composed of many scales;</span> <span class="statement" id="st-d0_s12" data-properties="scale duration;scale duration;scale arrangement;scale size;scale texture;scale texture">scales either persistent or deciduous with fruits, crowded, small, woody or leathery.</span> <span class="statement" id="st-d0_s13" data-properties="samara size;lateral wing quantity;lateral wing texture;lateral wing size"><b>Fruits </b>tiny samaras, lateral wings 2, membranous, sometimes reduced to ridges;</span> <span class="statement" id="st-d0_s14" data-properties="pericarp width;pericarp texture">pericarp thin, leathery.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Trunks </b>and branches terete. <b>Bark</b> thin, close or exfoliating in thin sheets, becoming thicker and frequently furrowed or broken in age; lenticels often present, prominent, sometimes becoming greatly expanded horizontally. <b>Bark</b> and wood strongly tanniferous. <b>Young</b> twigs and buds often covered with small to large, resinous glands; pith triangular in cross section. <b>Leaves</b> 3-ranked, occasionally nearly 2-ranked. <b>Staminate</b> flowers: perianth of 4(–6) sepals, well defined, minute, membranaceous. <b>Pistillate</b> flowers 2–3 per scale, scales arranged in conelike catkins; perianth not obvious; ovules with 1 integument. <b>Infructescences</b> 1–4 cm, conelike, composed of many scales; scales either persistent or deciduous with fruits, crowded, small, woody or leathery. <b>Fruits</b> tiny samaras, lateral wings 2, membranous, sometimes reduced to ridges; pericarp thin, leathery.</span><!--
  
 
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-->{{#Taxon:
 
-->{{#Taxon:
 
name=Betulaceae subfam. Betuloideae
 
name=Betulaceae subfam. Betuloideae
|author=
 
 
|authority=Koehne
 
|authority=Koehne
 
|rank=subfamily
 
|rank=subfamily
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|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_70.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V3/V3_70.xml
 
|subfamily=Betulaceae subfam. Betuloideae
 
|subfamily=Betulaceae subfam. Betuloideae
|bark architecture=tanniferous;furrowed
 
|bark arrangement=close
 
|bark condition or fragility=broken
 
|bark relief=exfoliating
 
|bark width=thin
 
|branch shape=terete
 
|bud life cycle=young
 
|catkin shape=conelike
 
|flower architecture=pistillate;staminate
 
|flower quantity=2;3
 
|gland coating=resinous
 
|gland size=small;large
 
|infructescence shape=conelike
 
|infructescence some measurement=1cm;4cm
 
|integument quantity=1
 
|lateral wing quantity=2
 
|lateral wing size=reduced
 
|lateral wing texture=membranous
 
|leaf arrangement=2-ranked;3-ranked
 
|lenticel presence=absent
 
|lenticel prominence=prominent
 
|lenticel size=expanded
 
|perianth prominence=not obvious;defined
 
|perianth size=minute
 
|perianth texture=membranaceous
 
|pericarp texture=leathery
 
|pericarp width=thin
 
|pith shape=triangular
 
|samara size=tiny
 
|scale arrangement=crowded;arranged
 
|scale duration=deciduous;persistent
 
|scale quantity=many
 
|scale size=small
 
|scale texture=leathery;woody
 
|sepal atypical quantity=4;6
 
|sepal quantity=4
 
|sheet width=thicker;thin
 
|trunk shape=terete
 
|twig life cycle=young
 
|wood architecture=tanniferous
 
 
}}<!--
 
}}<!--
  
 
-->[[Category:Treatment]][[Category:Betulaceae]]
 
-->[[Category:Treatment]][[Category:Betulaceae]]

Latest revision as of 21:50, 5 November 2020

Trunks and branches terete. Bark thin, close or exfoliating in thin sheets, becoming thicker and frequently furrowed or broken in age; lenticels often present, prominent, sometimes becoming greatly expanded horizontally. Bark and wood strongly tanniferous. Young twigs and buds often covered with small to large, resinous glands; pith triangular in cross section. Leaves 3-ranked, occasionally nearly 2-ranked. Staminate flowers: perianth of 4(–6) sepals, well defined, minute, membranaceous. Pistillate flowers 2–3 per scale, scales arranged in conelike catkins; perianth not obvious; ovules with 1 integument. Infructescences 1–4 cm, conelike, composed of many scales; scales either persistent or deciduous with fruits, crowded, small, woody or leathery. Fruits tiny samaras, lateral wings 2, membranous, sometimes reduced to ridges; pericarp thin, leathery.

Distribution

Primarily boreal and cool temperate zones of Northern Hemisphere

Discussion

Genera 2, species 60 (2 genera, 26 species in the flora).

Selected References

None.

Lower Taxa