Pinus echinata |
Pinus ponderosa |
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shortleaf pine |
bull pine, pin à bois lourd, pinabete, pino real, ponderosa pine, western yellow pine, yellow pine |
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Habit | Trees to 40m; trunk to 1.2m diam., straight; crown rounded to conic. | Trees to 72m; trunk to 2.5m diam., straight; crown broadly conic to rounded. | ||||||||
Bark | red-brown, scaly-plated, plates with evident resin pockets. |
yellow- to red-brown, deeply irregularly furrowed, cross-checked into broadly rectangular, scaly plates. |
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Branches | spreading-ascending; 2-year-old branchlets slender (ca. 5mm or less), greenish brown to red-brown, often glaucous, aging red-brown to gray, roughened and cracking below leafy portion. |
descending to spreading-ascending; twigs stout (to 2cm thick), orange-brown, aging darker orange-brown, rough. |
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Buds | ovoid to cylindric, red-brown, 0.5–0.7(–1)cm, resinous. |
ovoid, to 2cm, fully 1cm broad, red-brown, very resinous; scale margins white-fringed. |
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Leaves | 2(–3) per fascicle, spreading-ascending, persistent 3–5 years, (5–)7–11(–13)cm × ca. 1mm, straight, slightly twisted, gray- to yellow-green, all surfaces with fine stomatal lines, margins finely serrulate, apex abruptly acute; sheath 0.5–1(–1.5)cm, base persistent. |
2–5 per fascicle, spreading to erect, persisting (2–)4–6(–7) years, 7–25(–30)cm × (1–)1.2–2mm, slightly twisted, tufted at twig tips, pliant, deep yellow-green, all surfaces with evident stomatal lines, margins serrulate, apex abruptly to narrowly acute or acuminate; sheath 1.5–3cm, base persistent. |
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Pollen cones | cylindric, 15–20mm, yellow- to pale purple-green. |
ellipsoid-cylindric, 1.5–3.5cm, yellow or red. |
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Seed(s) | cones maturing in 2 years, semipersistent, solitary or clustered, spreading, symmetric, lanceoloid or narrowly ovoid before opening, ovoid-conic when open, 4–6(–7)cm, red-brown, aging gray, nearly sessile or on stalks to 1cm, scales lacking contrasting dark border on adaxial surfaces distally; umbo central, with elongate to short, stout, sharp prickle. |
cones maturing in 2 years, shedding seeds soon thereafter, leaving rosettes of scales on branchlets, solitary or rarely in pairs, spreading to reflexed, symmetric to slightly asymmetric, conic-ovoid before opening, broadly ovoid when open, 5–15cm, mostly reddish brown, sessile to nearly sessile, scales in steep spirals (as compared to Pinus jeffreyi) of 5–7 per row as viewed from side, those of cones just prior to and after cone fall spreading and reflexed, thus well separate from adjacent scales; apophyses dull to lustrous, thickened and variously raised and transversely keeled; umbo central, usually pyramidal to truncated, rarely depressed, merely acute, or with a very short apiculus, or with a stout-based spur or prickle. |
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2n | =24. |
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Pinus echinata |
Pinus ponderosa |
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Habitat | Uplands, dry forests | |||||||||
Elevation | 200–610m (700–2000ft) | |||||||||
Distribution |
AL; AR; DE; FL; GA; IL; KY; LA; MD; MO; MS; NC; NY; OH; OK; PA; SC; TN; TX; VA; WV
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AZ; CA; CO; ID; MT; ND; NE; NM; NV; OK; OR; SD; TX; UT; WA; WY; BC; Mexico
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Discussion | Although Pinus echinata is highly valued for timber and pulpwood, it is afflicted by root rot. It hybridizes with P. taeda, the pine most commonly associated with it. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Pinus ponderosa is the most economically important western yellow pine. Its wood is more similar in character to the white pines, and it is often referred to as white pine. The taxonomy of this complex is far from resolved. Ponderosa pine (Pinus ponderosa) is the state tree of Montana. Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 2. | FNA vol. 2. | ||||||||
Parent taxa | Pinaceae > Pinus | Pinaceae > Pinus | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | Miller: Gard. Dict., ed. 8 Pinus no. 12. (1768) | Douglas ex Lawson & C. Lawson: Agric. Man. 354. (1836) | ||||||||
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