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/Synonym
|name=Pinus tuberculata
|authority=Gordon
}}
|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-d0_s0" data-properties="shrub some measurement;tree some measurement"><b>Shrubs </b>or trees to 24m;</span> <span class="statement" id="st-d0_s1" data-properties="trunk diameter;trunk course">trunk to 0.8m diam., usually straight;</span> <span class="statement" id="st-d0_s2" data-properties="crown shape">crown mostly narrowly to broadly conic.</span> <span class="statement" id="st-d0_s3" data-properties="bark coloration;bark coloration;bark coloration;bark relief;plate architecture or course;plate prominence or shape;plate architecture or pubescence;upper section architecture or pubescence or relief"><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.</span> <span class="statement" id="st-d0_s4" data-properties="branch orientation"><b>Branches </b>ascending;</span> <span class="statement" id="st-d0_s5" data-properties="twig size;twig coloration">twigs slender, redbrown.</span> <span class="statement" id="st-d0_s6" data-properties="bud shape;bud shape;bud shape;bud coloration;bud life cycle;bud coloration;bud some measurement;bud coating"><b>Buds </b>ovoid to ovoid-cylindric, dark redbrown, aging darker, ca. 1.5cm, resinous;</span> <span class="statement" id="st-d0_s7" data-properties="scale margin shape;apex shape">scale margins fringed, apex attenuate.</span> <span class="statement" id="st-d0_s8" data-properties="leaf count;leaf orientation;leaf orientation;leaf duration;leaf count;leaf atypical length;leaf atypical length;leaf length;leaf atypical width;leaf width;leaf course;leaf course;leaf architecture;leaf coloration;stomatal width;line width;margin architecture or shape;apex shape"><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;</span> <span class="statement" id="st-d0_s9" data-properties="sheath atypical some measurement;sheath some measurement;base duration">sheath (1–) 1.5–2cm, base persistent.</span> <span class="statement" id="st-d0_s10" data-properties="pollen cone shape;pollen cone some measurement;pollen cone coloration"><b>Pollen </b>cones ellipsoid-cylindric, 10–15mm, orangebrown.</span> <span class="statement" id="st-d0_s11" data-properties="seed-cone life cycle;seed-cone maturation;seed-cone duration;seed-cone condition;seed-cone texture;seed-cone architecture or shape;seed-cone shape;seed-cone shape;seed-cone distance;seed-cone coloration;seed-cone coloration;year count;burning count;stalk some measurement"><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 redbrown, stalks to 1cm;</span> <span class="statement" id="st-d0_s12" data-properties="apophysis shape;apophysis shape;apophysis orientation;apophysis shape;base shape">apophyses toward outside base increasingly elongate, mammillate or raised-angled-conic, downcurved near base, scarcely raised on branchlet side, rhombic;</span> <span class="statement" id="st-d0_s13" data-properties="umbo position;umbo shape;umbo shape;umbo orientation">umbo central, low-pyramidal, sharp, upcurved.</span> <span class="statement" id="st-d0_s14" data-properties="seed shape"><b>Seeds </b>compressed-oblique-obovoid;</span> <span class="statement" id="st-d0_s15" data-properties="body some measurement;body coloration">body ca. 6–7mm, nearly black;</span> <span class="statement" id="st-d0_s16" data-properties="">wing narrow, to 20mm.</span> <span class="statement" id="st-d0_s17" data-properties="wing size or width;wing some measurement;2n chromosome count">2n =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>Pinus attenuata, 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 P. muricata and P. radiata.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Pinus attenuata
|author=
|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://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_38.xml
|genus=Pinus
|species=Pinus attenuata
|2n chromosome count=24
|apex shape=conic-subulate;attenuate
|apophysis orientation=downcurved
|apophysis shape=rhombic;raised-angled-conic;mammillate
|bark coloration=purple-brown;dark-brown
|bark relief=fissured
|base duration=persistent
|base shape=elongate
|body coloration=black
|body some measurement=6mm;7mm
|branch orientation=ascending
|bud coating=resinous
|bud coloration=darker;dark redbrown
|bud life cycle=aging
|bud shape=ovoid;ovoid-cylindric
|bud some measurement=1.5
|burning count=20
|crown shape=conic
|leaf architecture=twisted
|leaf atypical length=15cm;20cm
|leaf atypical width=1mm;1.3mm
|leaf coloration=yellow-green
|leaf count=4;5
|leaf course=curved;straight
|leaf duration=persisting
|leaf length=9cm;15cm
|leaf orientation=ascending;spreading
|leaf width=1.3mm;1.8mm
|line width=fine
|margin architecture or shape=serrulate
|plate architecture or course=irregular
|plate architecture or pubescence=loose-scaly
|plate prominence or shape=flat
|pollen cone coloration=orangebrown
|pollen cone shape=ellipsoid-cylindric
|pollen cone some measurement=10mm;15mm
|scale margin shape=fringed
|seed shape=compressed-oblique-obovoid
|seed-cone architecture or shape=asymmetric
|seed-cone coloration=pale redbrown;yellow
|seed-cone condition=closed
|seed-cone distance=8cm;15cm
|seed-cone duration=long-persistent
|seed-cone life cycle=maturing
|seed-cone maturation=serotinous
|seed-cone shape=ovoid-cylindric;lanceoloid
|seed-cone texture=hard
|sheath atypical some measurement=1cm;1.5cm
|sheath some measurement=1.5cm;2cm
|shrub some measurement=0m;24m
|stalk some measurement=1
|stomatal width=fine
|tree some measurement=0m;24m
|trunk course=straight
|trunk diameter=0m;0.8m
|twig coloration=redbrown
|twig size=slender
|umbo orientation=upcurved
|umbo position=central
|umbo shape=sharp;low-pyramidal
|upper section architecture or pubescence or relief=smooth
|wing size or width=narrow
|wing some measurement=0mm;20mm
|year count=2
}}<!--

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