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| − | --><span class="statement" id="st-d0_s0" data-properties="tree some measurement"><b>Trees </b>to 50m;</span> <span class="statement" id="st-d0_s1" data-properties="trunk diameter;trunk height">trunk to 2m diam., usually (when forest grown) branch-free over most of height;</span> <span class="statement" id="st-d0_s2" data-properties="crown height or length or size;crown shape">crown short, conic.</span> <span class="statement" id="st-d0_s3" data-properties="bark coloration;bark architecture or pubescence;between plates furrow depth;plate prominence or shape;plate fragility;plate coloration"><b>Bark </b>reddish-brown, scaly, with deep furrows between flat, flaky, cinnamon-colored plates.</span> <span class="statement" id="st-d0_s4" data-properties="branch orientation;branch orientation;tree habitat"><b>Branches </b>horizontal, occasionally drooping in lower crown of open-grown trees;</span> <span class="statement" id="st-d0_s5" data-properties="twig coloration;twig pubescence;twig pubescence;twig pubescence">twigs orangebrown, initially pubescent, becoming glabrous or very sparsely pubescent during first-year.</span> <span class="statement" id="st-d0_s6" data-properties="bud coloration;bud pubescence;scale margin architecture or relief"><b>Buds </b>dark-brown, generally puberulent, scale margins erose.</span> <span class="statement" id="st-d0_s7" data-properties="leaf thickness;leaf thickness;leaf thickness;leaf shape;leaf coloration;midrib depth;midrib shape"><b>Leaves </b>of short-shoots 2–5cm × 0.65–0.80mm, 0.4–0.6mm thick, keeled abaxially, with shallow convex midrib adaxially, pale green;</span> <span class="statement" id="st-d0_s8" data-properties="resin canal location;epithelial count;cell count">resin canals 20–50 µm from margins, each surrounded by 5–7 epithelial cells.</span> <span class="statement" id="st-d0_s9" data-properties="seed-cone length;seed-cone width;stalk course;stalk length;stalk width"><b>Seed-</b>cones 2–3 × 1.3–1.6cm, on curved stalks 2.5–4.5 × 3.5–5mm;</span> <span class="statement" id="st-d0_s10" data-properties="scale count;margin architecture or shape;adaxial surface pubescence">scales 45–55, margins entire, adaxial surface pubescent;</span> <span class="statement" id="st-d0_s11" data-properties="bract architecture;awn some measurement">bracts tipped by awn to 3mm, exceeding scales by ca. 4mm.</span> <span class="statement" id="st-d0_s12" data-properties="pollen diameter"><b>Pollen </b>71–84µm diam.</span> <span class="statement" id="st-d0_s13" data-properties="seed coloration;body some measurement"><b>Seeds </b>reddish-brown, body 3mm, wing 6mm.</span> <span class="statement" id="st-d0_s14" data-properties="wing some measurement;2n chromosome count">2n =24.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>to 50m; trunk to 2m diam., usually (when forest grown) branch-free over most of height; crown short, conic. <b>Bark</b> reddish brown, scaly, with deep furrows between flat, flaky, cinnamon-colored plates. <b>Branches</b> horizontal, occasionally drooping in lower crown of open-grown trees; twigs orange-brown, initially pubescent, becoming glabrous or very sparsely pubescent during first year. <b>Buds</b> dark brown, generally puberulent, scale margins erose. <b>Leaves</b> of short shoots 2–5cm × 0.65–0.80mm, 0.4–0.6mm thick, keeled abaxially, with shallow convex midrib adaxially, pale green; resin canals 20–50 µm from margins, each surrounded by 5–7 epithelial cells. <b>Seed</b> cones 2–3 × 1.3–1.6cm, on curved stalks 2.5–4.5 × 3.5–5mm; scales 45–55, margins entire, adaxial surface pubescent; bracts tipped by awn to 3mm, exceeding scales by ca. 4mm. <b>Pollen</b> 71–84µm diam. <b>Seeds</b> reddish brown, body 3mm, wing 6mm. <b>2n</b> =24.</span><!-- |
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| | |publication year=1849 | | |publication year=1849 |
| | |special status= | | |special status= |
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_122.xml | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_122.xml |
| | |genus=Larix | | |genus=Larix |
| | |species=Larix occidentalis | | |species=Larix occidentalis |
| − | |2n chromosome count=24
| |
| − | |adaxial surface pubescence=pubescent
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| − | |awn some measurement=0mm;3mm
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| − | |bark architecture or pubescence=scaly
| |
| − | |bark coloration=reddish-brown
| |
| − | |between plates furrow depth=deep
| |
| − | |body some measurement=3
| |
| − | |bract architecture=tipped
| |
| − | |branch orientation=drooping;horizontal
| |
| − | |bud coloration=dark-brown
| |
| − | |bud pubescence=puberulent
| |
| − | |cell count=5;7
| |
| − | |crown height or length or size=short
| |
| − | |crown shape=conic
| |
| − | |epithelial count=5;7
| |
| − | |leaf coloration=pale green
| |
| − | |leaf shape=keeled
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| − | |leaf thickness=0.4mm;0.6mm
| |
| − | |margin architecture or shape=entire
| |
| − | |midrib depth=shallow
| |
| − | |midrib shape=convex
| |
| − | |plate coloration=cinnamon-colored
| |
| − | |plate fragility=flaky
| |
| − | |plate prominence or shape=flat
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| − | |pollen diameter=71µm;84µm
| |
| − | |resin canal location=20um;50um
| |
| − | |scale count=45;55
| |
| − | |scale margin architecture or relief=erose
| |
| − | |seed coloration=reddish-brown
| |
| − | |seed-cone length=2cm;3cm
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| − | |seed-cone width=1.3cm;1.6cm
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| − | |stalk course=curved
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| − | |stalk length=2.5mm;4.5mm
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| − | |stalk width=3.5mm;5mm
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| − | |tree habitat=open-grown
| |
| − | |tree some measurement=0m;50m
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| − | |trunk diameter=0m;2m
| |
| − | |trunk height=branch-free
| |
| − | |twig coloration=orangebrown
| |
| − | |twig pubescence=pubescent;glabrous;pubescent
| |
| − | |wing some measurement=6
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| | -->[[Category:Treatment]][[Category:Larix]] | | -->[[Category:Treatment]][[Category:Larix]] |
Trees to 50m; trunk to 2m diam., usually (when forest grown) branch-free over most of height; crown short, conic. Bark reddish brown, scaly, with deep furrows between flat, flaky, cinnamon-colored plates. Branches horizontal, occasionally drooping in lower crown of open-grown trees; twigs orange-brown, initially pubescent, becoming glabrous or very sparsely pubescent during first year. Buds dark brown, generally puberulent, scale margins erose. Leaves of short shoots 2–5cm × 0.65–0.80mm, 0.4–0.6mm thick, keeled abaxially, with shallow convex midrib adaxially, pale green; resin canals 20–50 µm from margins, each surrounded by 5–7 epithelial cells. Seed cones 2–3 × 1.3–1.6cm, on curved stalks 2.5–4.5 × 3.5–5mm; scales 45–55, margins entire, adaxial surface pubescent; bracts tipped by awn to 3mm, exceeding scales by ca. 4mm. Pollen 71–84µm diam. Seeds reddish brown, body 3mm, wing 6mm. 2n =24.
Habitat: Mountain valleys and lower slopes
Elevation: 500–1600m
Distribution
B.C., Idaho, Mont., Oreg., Wash.
Discussion
Western larch, when forest grown, is usually branch-free over most of its height. This is one of the most valuable timber-producing species in western North America. Its wood is made into framing, railway ties, pilings, exterior and interior finishing work, and pulp. In some localities it is the preferred firewood.
Selected References
None.
