Difference between revisions of "Pinus lambertiana"
Trans. Linn. Soc. London, Bot. 15: 500. 1827.
Common names: Sugar pine
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>to 75m; trunk to 3.3m diam., massive, straight; crown narrowly conic, becoming rounded. <b>Bark</b> cinnamon- to gray-brown, deeply furrowed, plates long, scaly. <b>Branches</b> spreading, distal branches ascending; twigs gray-green to red-tan, aging gray, mostly puberulent. <b>Buds</b> cylindro-ovoid, red-brown, to 0.8cm, resinous. <b>Leaves</b> 5 per fascicle, spreading to ascending, persisting 2–4 years, 5–10cm × (0.9–)1–1.5(–2)mm, straight, slightly twisted, pliant, blue-green, abaxial surface with only a few lines evident, adaxial surfaces with evident white stomatal lines, margins finely serrulate, apex acuminate; sheath (1–)1.5–2cm, shed early. <b>Pollen</b> cones ellipsoid-cylindric, to 15mm, yellow. <b>Seed</b> cones maturing in 2 years, shedding seeds and falling soon thereafter, often clustered, pendent, symmetric, cylindric before opening, lance-cylindric to ellipsoid-cylindric when open, 25–50cm, yellow-brown, stalks 6–15cm; apophyses somewhat thickened; umbo terminal, depressed, resinous, slightly excurved. <b>Seeds</b> obovoid, oblique apically; body 1–2cm, deep brown; wing broad, 2–3cm. <b>2n</b> =24.</span><!-- |
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|elevation=330–3200m | |elevation=330–3200m | ||
|distribution=Calif.;Nev.;Oreg.;Mexico in n Baja California. | |distribution=Calif.;Nev.;Oreg.;Mexico in n Baja California. | ||
| − | |discussion=<p>The largest species of the genus, Pinus lambertiana also has the longest seed cone in the genus. It is an important timber tree with harvest far exceeding regrowth. It is easily distinguished from P. monticola and P. strobus by its larger cones and thicker cone scales with larger seeds; it is somewhat less reliably distinguished by its leaves, which are slightly wider and more tapering-tipped and have some stomatal lines evident on the abaxial surfaces (the lines not evident in P. monticola and P. strobus). A "sugary" resin high in cyclitols exudes from the sweet-scented fresh-cut wood.</p> | + | |discussion=<p>The largest species of the genus, <i>Pinus lambertiana</i> also has the longest seed cone in the genus. It is an important timber tree with harvest far exceeding regrowth. It is easily distinguished from <i>P. monticola</i> and <i>P. strobus</i> by its larger cones and thicker cone scales with larger seeds; it is somewhat less reliably distinguished by its leaves, which are slightly wider and more tapering-tipped and have some stomatal lines evident on the abaxial surfaces (the lines not evident in <i>P. monticola</i> and <i>P. strobus</i>). A "sugary" resin high in cyclitols exudes from the sweet-scented fresh-cut wood.</p> |
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name=Pinus lambertiana | name=Pinus lambertiana | ||
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|publication year=1827 | |publication year=1827 | ||
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|genus=Pinus | |genus=Pinus | ||
|species=Pinus lambertiana | |species=Pinus lambertiana | ||
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Latest revision as of 20:23, 5 November 2020
Trees to 75m; trunk to 3.3m diam., massive, straight; crown narrowly conic, becoming rounded. Bark cinnamon- to gray-brown, deeply furrowed, plates long, scaly. Branches spreading, distal branches ascending; twigs gray-green to red-tan, aging gray, mostly puberulent. Buds cylindro-ovoid, red-brown, to 0.8cm, resinous. Leaves 5 per fascicle, spreading to ascending, persisting 2–4 years, 5–10cm × (0.9–)1–1.5(–2)mm, straight, slightly twisted, pliant, blue-green, abaxial surface with only a few lines evident, adaxial surfaces with evident white stomatal lines, margins finely serrulate, apex acuminate; sheath (1–)1.5–2cm, shed early. Pollen cones ellipsoid-cylindric, to 15mm, yellow. Seed cones maturing in 2 years, shedding seeds and falling soon thereafter, often clustered, pendent, symmetric, cylindric before opening, lance-cylindric to ellipsoid-cylindric when open, 25–50cm, yellow-brown, stalks 6–15cm; apophyses somewhat thickened; umbo terminal, depressed, resinous, slightly excurved. Seeds obovoid, oblique apically; body 1–2cm, deep brown; wing broad, 2–3cm. 2n =24.
Habitat: Montane dry to moist forests
Elevation: 330–3200m
Distribution
Calif., Nev., Oreg., Mexico in n Baja California.
Discussion
The largest species of the genus, Pinus lambertiana also has the longest seed cone in the genus. It is an important timber tree with harvest far exceeding regrowth. It is easily distinguished from P. monticola and P. strobus by its larger cones and thicker cone scales with larger seeds; it is somewhat less reliably distinguished by its leaves, which are slightly wider and more tapering-tipped and have some stomatal lines evident on the abaxial surfaces (the lines not evident in P. monticola and P. strobus). A "sugary" resin high in cyclitols exudes from the sweet-scented fresh-cut wood.
Selected References
None.
Lower Taxa
None.