Pinus ponderosa |
Pinus serotina |
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bull pine, pin à bois lourd, pinabete, pino real, ponderosa pine, western yellow pine, yellow pine |
marsh pine, pocosin pine, pond pine |
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Habit | Trees to 72m; trunk to 2.5m diam., straight; crown broadly conic to rounded. | Trees to 21m; trunk to 0.6m diam., straight or more often crooked, commonly with adventitious sprouts; crown becoming ragged, thin, often broadly rounded or flat. | ||||||||
Bark | yellow- to red-brown, deeply irregularly furrowed, cross-checked into broadly rectangular, scaly plates. |
red-brown, irregularly furrowed and cross-checked into rectangular, flat, scaly plates. |
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Branches | descending to spreading-ascending; twigs stout (to 2cm thick), orange-brown, aging darker orange-brown, rough. |
spreading to ascending; twigs stout, orange- to yellow-orange, frequently glaucous, aging darker. |
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Buds | ovoid, to 2cm, fully 1cm broad, red-brown, very resinous; scale margins white-fringed. |
ovoid to narrowly ovoid, red-brown, 1–1.5(–2)cm, resinous. |
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Leaves | 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. |
3 per fascicle (to 5 in adventitious or disturbed growth), spreading to ascending, persisting 2–3 years, (12–)15–20(–21)cm × 1.3–1.5(–2)mm, slightly twisted, tufted at twig tips, straight, yellow-green, all surfaces with fine stomatal lines, margins serrulate, apex acuminate; sheath 1–2cm, base persistent. |
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Pollen cones | ellipsoid-cylindric, 1.5–3.5cm, yellow or red. |
cylindric, to 30mm, yellow-brown. |
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Seed(s) | 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. |
cones maturing in 2 years, in some populations beginning to shed seeds then but more often variably serotinous, long-persistent, often whorled, symmetric, ovoid to lanceoloid before opening, broadly ovoid to nearly globose when open, 5–8cm, pale red-brown to creamy brown, sessile or on stalks to 1cm, scales with dark red-brown border on adaxial surface distally; apophyses slightly thickened, low, rhombic, low cross-keeled; umbo central, low-conic, with short, weak prickle, sometimes unarmed. |
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2n | =24. |
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Pinus ponderosa |
Pinus serotina |
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Habitat | Flatwoods, flatwoods bogs, savannas, and barrens | |||||||||
Elevation | 0–200m (0–700ft) | |||||||||
Distribution |
AZ; CA; CO; ID; MT; ND; NE; NM; NV; OK; OR; SD; TX; UT; WA; WY; BC; Mexico
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AL; DE; FL; GA; MD; NC; NJ; SC; VA
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Discussion | 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.) |
Pinus serotina is fire successional and sprouts adventitiously after crown fires. It is part of a distinct forest type including Taxodium distichum (Linnaeus) Richard, Nyssa biflora Walter, Magnolia virginiana Linnaeus, Persea sp., and Ilex sp. Of good form when protected from fire, P. serotina then much resembles P. taeda, with which it hybridizes naturally. It is of increasing importance as pulpwood. (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 | ||||||||
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Synonyms | P. rigida subsp. serotina, P. rigida var. serotina | |||||||||
Name authority | Douglas ex Lawson & C. Lawson: Agric. Man. 354. (1836) | Michaux: Fl. Bor.-Amer. 2: 205. (1803) | ||||||||
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