Pinus attenuata |
Pinus resinosa |
|
---|---|---|
knobcone pine |
Norway pine, pin rouge, red pine |
|
Habit | Shrubs or trees to 24m; trunk to 0.8m diam., usually straight; crown mostly narrowly to broadly conic. | Trees to 37m; trunk to 1.5m diam., straight; crown narrowly rounded. |
Bark | purple-brown to dark brown, shallowly and narrowly fissured, with irregular, flat, loose-scaly plates, on upper sections of trunk nearly smooth. |
light red-brown, furrowed and cross-checked into irregularly rectangular, scaly plates. |
Branches | ascending; twigs slender, red-brown. |
spreading-ascending; twigs moderately slender (to 1cm thick), orange- to red-brown, aging darker brown, rough. |
Buds | ovoid to ovoid-cylindric, dark red-brown, aging darker, ca. 1.5cm, resinous; scale margins fringed, apex attenuate. |
ovoid-acuminate, red-brown, to ca. 2cm, resinous; scale margins fringed. |
Leaves | 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. |
2 per fascicle, straight or slightly twisted, brittle, breaking cleanly when bent, deep yellow-green, all surfaces with narrow stomatal bands, margins serrulate, apex short-conic, acute; sheath 1–2.5cm, base persistent. |
Pollen cones | ellipsoid-cylindric, 10–15mm, orange-brown. |
ellipsoid, ca. 15mm, dark purple. |
Seed(s) | 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. |
cones maturing and opening in 2 years, spreading, symmetric, ovoid before opening, broadly ovoid to nearly globose when open, 3.5–6cm, light red-brown, nearly sessile; apophyses slightly thickened, slightly raised, transversely low-keeled; umbo central, centrally depressed, unarmed. |
2n | =24. |
=24. |
Pinus attenuata |
Pinus resinosa |
|
Habitat | Fire successional on dry slopes and foothills of Sierra Nevada and the Cascade and Coast ranges | Sandy soils, eastern boreal forests |
Elevation | 300–1200m (1000–3900ft) | 200–800(–1300)m (700–2600(–4300)ft) |
Distribution |
CA; OR; Mexico in Baja California
|
CT; IL; MA; ME; MI; MN; NH; NJ; NY; PA; VT; WI; WV; MB; NB; NF; NS; ON; PE; QC
|
Discussion | 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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Pinus resinosa was once the most important timber pine in the Great Lakes region. Norway pine (Pinus resinosa) is the state tree of Minnesota. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Pinaceae > Pinus | Pinaceae > Pinus |
Sibling taxa | ||
Synonyms | P. tuberculata | |
Name authority | Lemmon: Mining Sci. Press 64: 45. (1892) | Aiton: Hort. Kew. 3: 367. (1789) |
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