Pinus longaeva |
Pinus monophylla |
|
---|---|---|
bristlecone pine, Great Basin bristlecone pine, intermountain bristlecone pine |
piñón, single leaf pinyon, single-leaf pine, singleleaf pinyon pine |
|
Habit | Trees to 16m; trunk to 2m diam., strongly tapering; crown rounded, flattened (sheared), or irregular. | Trees to 14m; trunk to 0.5m diam., strongly tapering, much branched; crown usually rounded, dense. |
Bark | red-brown, shallowly to deeply fissured with thick, scaly, irregular, blocky ridges. |
red-brown, irregularly furrowed or cross-checked, scaly. |
Branches | contorted, pendent; twigs pale red-brown, aging gray to yellow-gray, puberulent, young branches resembling long bottlebrushes because of persistent leaves. |
spreading and ascending, persistent to near trunk base; twigs stout, orange-brown, aging brown to gray, sometimes sparsely puberulent. |
Buds | ovoid-acuminate, pale red-brown, ca. 1cm, resinous. |
ellipsoid, light red-brown, 0.5–0.7cm, resinous; scale margins fringed. |
Leaves | mostly 5 per fascicle, upcurved, persisting 10–30 years, 1.5–3.5cm × 0.8–1.2mm, mostly connivent, deep yellow-green, with few resin splotches but often scurfy with pale scales, abaxial surface without median groove but with 2 subepidermal but evident resin bands, adaxial surfaces conspicuously whitened with stomates, margins entire or remotely and finely serrulate distally, apex bluntly acute to short-acuminate; sheath ca. 1cm, soon forming rosette, shed early. |
1(–2) per fascicle, ascending, persisting 4–6(–10) years, 2–6cm × 1.3–2(–2.5)mm, curved, terete (though often 2-grooved), gray-green, all surfaces with stomatal lines, margins entire, apex subulate; sheath 0.5–1cm, scales soon recurved, forming rosette, shed early. |
Pollen cones | cylindro-ellipsoid, 7–10mm, purple-red. |
ellipsoid, ca. 10mm, yellow. |
Seed(s) | cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, lance-cylindric with rounded base before opening, lance-cylindric to narrowly ovoid when open, 6–9.5cm, purple, aging red-brown, nearly sessile; apophyses much thickened, sharply keeled; umbo central, raised on low buttress, truncate to umbilicate, abruptly narrowed to slender but stiff, variable prickle 1–6mm, resin exudate pale. |
cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, ovoid before opening, broadly depressed-ovoid to nearly globose when open, 4–6(–8)cm, pale yellow-brown, nearly sessile; apophyses thickened, slightly raised; umbo subcentral, raised or depressed, nearly truncate, apiculate. |
2n | =24. |
|
Pinus longaeva |
Pinus monophylla |
|
Habitat | Subalpine and alpine | Dry low-montane or foothill pinyon-juniper woodland |
Elevation | 1700–3400m (5600–11200ft) | 1000–2300m (3300–7500ft) |
Distribution |
CA; NV; UT
|
AZ; CA; ID; NV; UT; Mexico in Baja California
|
Discussion | Pinus longaeva is considered by dendrochronologists to be the longest-lived tree. One tree was estimated to be 5000 years old. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Pinus monophylla hybridizes with P. edulis and P. quadrifolia. Singleleaf pinyon (Pinus monophylla) is the state tree of Nevada. (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. aristata var. longaeva | Caryopitys monophylla, P. californiarum, P. cembroides var. monophylla |
Name authority | D. K. Bailey: Ann. Missouri Bot. Gard. 57: 243. (1970) | Torrey & Frémont: in Frémont, Rep. Exped. Rocky Mts. 2: 319, plate 4. (1845) |
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