View source for Pinus attenuata

{{Treatment/ID
|accepted_name=Pinus attenuata
|accepted_authority=Lemmon
|publications={{Treatment/Publication
|title=Mining Sci. Press
|place=64: 45. 1892
|year=1892
}}
|common_names=Knobcone pine
|basionyms={{Treatment/ID/Basionym
|name=Pinus tuberculata
|authority=Gordon
|rank=species
|publication_title=
|publication_place=1849,
}}
|synonyms=
|hierarchy=Pinaceae;Pinus;Pinus attenuata
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pinaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pinus]]</div><div class="higher-taxon"><small>species</small>[[Pinus attenuata]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs </b>or trees to 24m; trunk to 0.8m diam., usually straight; crown mostly narrowly to broadly conic. <b>Bark</b> purple-brown to dark brown, shallowly and narrowly fissured, with irregular, flat, loose-scaly plates, on upper sections of trunk nearly smooth. <b>Branches</b> ascending; twigs slender, red-brown. <b>Buds</b> ovoid to ovoid-cylindric, dark red-brown, aging darker, ca. 1.5cm, resinous; scale margins fringed, apex attenuate. <b>Leaves</b> 3 per fascicle, spreading or ascending, persisting 4–5 years, (8–)9–15(–20)cm × (1–)1.3–1.8mm, straight or slightly curved, twisted, yellow-green, all surfaces with fine stomatal lines, margins serrulate, apex abruptly conic-subulate; sheath (1–)1.5–2cm, base persistent. <b>Pollen</b> cones ellipsoid-cylindric, 10–15mm, orange-brown. <b>Seed</b> cones maturing in 2 years, serotinous, long-persistent, remaining closed for 20 years or more, or opening on burning, in whorls, hard and heavy, very asymmetric, lanceoloid before opening, ovoid-cylindric when open, 8–15cm, yellow- or pale red-brown, stalks to 1cm; apophyses toward outside base increasingly elongate, mammillate or raised-angled-conic, downcurved near base, scarcely raised on branchlet side, rhombic; umbo central, low-pyramidal, sharp, upcurved. <b>Seeds</b> compressed-oblique-obovoid; body ca. 6–7mm, nearly black; wing narrow, to 20mm. <b>2n</b> =24.</span><!--

-->{{Treatment/Body
|habitat=Fire successional on dry slopes and foothills of Sierra Nevada and the Cascade and Coast ranges
|elevation=300–1200m
|distribution=Calif.;Oreg.;Mexico in Baja California.
|discussion=<p><i>Pinus attenuata</i>, mostly a chaparral species, bears cones at an early age. Its seed crops are heavy, and a hot fire permits the seeds to be released. It forms hybrids with <i>P. muricata</i> and <i>P. radiata</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Pinus attenuata
|authority=Lemmon
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Pinus tuberculata
|family=Pinaceae
|habitat=Fire successional on dry slopes and foothills of Sierra Nevada and the Cascade and Coast ranges
|elevation=300–1200m
|distribution=Calif.;Oreg.;Mexico in Baja California.
|reference=None
|publication title=Mining Sci. Press
|publication year=1892
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_38.xml
|genus=Pinus
|species=Pinus attenuata
}}<!--

-->[[Category:Treatment]][[Category:Pinus]]