Pinus monophylla |
Pinus muricata |
|
---|---|---|
piñón, single leaf pinyon, single-leaf pine, singleleaf pinyon pine |
Bishop pine |
|
Habit | Trees to 14m; trunk to 0.5m diam., strongly tapering, much branched; crown usually rounded, dense. | Trees to 24m; trunk to 0.9m diam., straight to contorted; crown becoming rounded, flattened, or irregular. |
Bark | red-brown, irregularly furrowed or cross-checked, scaly. |
dark gray, deeply furrowed, ridges long, scaly-plated. |
Branches | spreading and ascending, persistent to near trunk base; twigs stout, orange-brown, aging brown to gray, sometimes sparsely puberulent. |
spreading-ascending, often contorted; twigs stout to slender, orange-brown, aging darker brown, rough. |
Buds | ellipsoid, light red-brown, 0.5–0.7cm, resinous; scale margins fringed. |
ovoid-cylindric, dark brown, 1–2.5cm, resinous. |
Leaves | 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. |
2 per fascicle, spreading to upcurved, persisting 2–3 years, 8–15cm × (1.2–)1.5(–2)mm, slightly twisted, dark yellow-green, all surfaces with stomatal lines, margins strongly serrulate, apex abruptly conic-acute; sheath to 1.5cm, base persistent. |
Pollen cones | ellipsoid, ca. 10mm, yellow. |
ellipsoid, to 5mm, orange. |
Seed(s) | 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. |
cones maturing in 3 years, serotinous, long-persistent, mostly in whorls, mostly asymmetric, lanceoloid-ovoid before opening, curved-ovoid when open, 4–9cm, glossy bright to pale red-brown, sessile or on stalks to 1cm, mostly downcurved, scales with deep red-brown border distally on adaxial surface; apophyses much thickened, the abaxial ones progressively more angulately dome-shaped toward base of cone; umbo central, a stout-based, curved claw. |
2n | =24. |
=24. |
Pinus monophylla |
Pinus muricata |
|
Habitat | Dry low-montane or foothill pinyon-juniper woodland | Dry ridges to coastal, windshorn forests, often in or around bogs |
Elevation | 1000–2300m (3300–7500ft) | 0–300m (0–1000ft) |
Distribution |
AZ; CA; ID; NV; UT; Mexico in Baja California
|
CA; Mexico in Baja California
|
Discussion | 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.) |
The several varieties described for Pinus muricata reflect the high variability in leaf characters and in degree of elaboration of apophysis and umbo in this species. The extremes can sometimes occur together. Of conservation concern. (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 | Caryopitys monophylla, P. californiarum, P. cembroides var. monophylla | P. muricata var. borealis, P. muricata var. cedrosensis, P. muricata var. stantonii, P. radiata var. binata, P. remorata |
Name authority | Torrey & Frémont: in Frémont, Rep. Exped. Rocky Mts. 2: 319, plate 4. (1845) | D. Don: Trans. Linn. Soc. London, Bot. 17: 441. (1836) |
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