Pinus ponderosa var. ponderosa

Common names: Ponderosa pine
Endemic
Treatment appears in FNA Volume 2.
Revision as of 23:35, 29 July 2020 by imported>Volume Importer
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Trees to 72m; trunk to 2.5m diam. Twigs commonly redbrown, not glaucous. Buds very resinous. Leaves mainly 3 per fascicle, 12–25 (–30) cm × (1.2–) 1.5–2mm. Pollen cones mostly red. Seed-cones 8–15cm, symmetric; apophyses of fertile scales moderately raised; umbo low-pyramidal, tapering acuminately to short broad-based prickle. Seed body 6–9mm; wing 15–25mm.


Habitat: Montane, dry, open forests
Elevation: 0–2300m

Distribution

V2 92-distribution-map.gif

B.C., Calif., Nev., Oreg., Wash.

Discussion

Pinus ponderosa var. ponderosa is sympatric with and hybridizes with P. jeffreyi, but in areas of sympatry it usually occurs at lower elevations than P. jeffreyi. Loggers often distinguish the two by the strong turpentine odor of fresh-cut wood of P. ponderosa, which contrasts with the sweeter odor of P. jeffreyi. Harvest of var. ponderosa far exceeds regrowth because of high timber value and multiple uses of the wood. Pinus ponderosa var. ponderosa is the largest and stateliest yellow pine in the flora.

Selected References

None.

Lower Taxa

None.

"relatively thin" is not a number.

resinous +
acuminate +  and acute +
Robert Kral +
Douglas ex Lawson & C. Lawson +
yellow;redbrown +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
mottled darker +, brown +  and yellowbrown +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
descending +  and spreading-ascending +
resinous +
conspicuous +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
Ponderosa pine +
sessile +  and nearly sessile +
reddish-brown +
8 cm80 mm <br />0.08 m <br /> (15 cm150 mm <br />0.15 m <br />) +
spreading +  and reflexed +
ovoid +  and conic-ovoid +
symmetric to slightly +
broadly conic +  and rounded +
B.C. +, Calif. +, Nev. +, Oreg. +  and Wash. +
0–2300m +
sheathed +  and sessile +
rounded +, 2-3-angled +  and terete +
Montane, dry, open forests +
arranged +  and fascicles +
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
yellow-green +
persisting +
12 cm120 mm <br />0.12 m <br /> (25 cm250 mm <br />0.25 m <br />) +
spreading;erect +
scale-like +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
rectangular +
not winged +  and 2-winged +
ellipsoid-cylindric +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
broad-based +
Agric. Man. +
fibrous;woody +
adjacent +  and separate +
persistent +
white-fringed +
reflexed +  and spreading +
flattened +
pliable +  and woody +
grouped +  and solitary +
long-persistent +
wingless +, winged +, stalked +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
persistent +
pendent;more or less erect +
ellipsoid-obovoid +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
reduced;well-defined short +
extended +
Apinus +, Strobus +  and Caryopitys +
Pinus ponderosa var. ponderosa +
Pinus ponderosa +
variety +
decurrent +  and elongate +
straight +
not glaucous +
tapering +  and low-pyramidal +
reduced +
1.5 cm15 mm <br />0.015 m <br /> (?) +  and 2.5 cm25 mm <br />0.025 m <br /> (?) +