Pinus monophylla |
Pinus banksiana |
|
---|---|---|
piñón, single leaf pinyon, single-leaf pine, singleleaf pinyon pine |
Jack pine, pin gris, scrub pine |
|
Habit | Trees to 14m; trunk to 0.5m diam., strongly tapering, much branched; crown usually rounded, dense. | Trees to 27m; trunk to 0.6m diam., straight to crooked; crown becoming irregularly rounded or spreading and flattened. |
Bark | red-brown, irregularly furrowed or cross-checked, scaly. |
orange- to red-brown, scaly. |
Branches | spreading and ascending, persistent to near trunk base; twigs stout, orange-brown, aging brown to gray, sometimes sparsely puberulent. |
descending to spreading-ascending, poorly self-pruning; twigs slender, orange-red to red-brown, aging gray-brown, rough. |
Buds | ellipsoid, light red-brown, 0.5–0.7cm, resinous; scale margins fringed. |
ovoid, red-brown, 0.5–1cm, resinous; scale margins nearly entire. |
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 or ascending, persisting 2–3 years, 2–5cm × 1–1.5(–2)mm, twisted, yellow-green, all surfaces with fine stomatal lines, margins finely serrulate, apex acute to short-subulate; sheath 0.3–0.6cm, semipersistent. |
Pollen cones | ellipsoid, ca. 10mm, yellow. |
cylindric, 10–15mm, yellow to orange-brown. |
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 2 years, shedding seeds soon thereafter or often long-serotinous and shedding seeds only through age or fire, upcurved, asymmetric, lanceoloid before opening, ovoid when open, 3–5.5cm, tan to light brown or greenish yellow, slick, nearly sessile or short-stalked, most apophyses depressed but increasingly mammillate toward outer cone base; umbo central, depressed, small, sunken centrally, unarmed or with a small, reflexed apiculus. |
2n | =24. |
=24. |
Pinus monophylla |
Pinus banksiana |
|
Habitat | Dry low-montane or foothill pinyon-juniper woodland | Fire successional in boreal forests, tundra transition, dry flats, and hills, sandy soils |
Elevation | 1000–2300m (3300–7500ft) | 0–800m (0–2600ft) |
Distribution |
AZ; CA; ID; NV; UT; Mexico in Baja California
|
IL; IN; ME; MI; MN; NH; NY; PA; VT; WI; AB; BC; MB; NB; NS; NT; ON; PE; QC; SK
|
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.) |
Pinus banksiana reaches its largest size and best form in Canada. In western Alberta and in northeastern British Columbia, it is sympatric with P. contorta and forms hybrid swarms with that species. Jack pine (Pinus banksiana) is the territorial tree of the Northwest Territories. (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. divaricata, P. sylvestris var. divaricata |
Name authority | Torrey & Frémont: in Frémont, Rep. Exped. Rocky Mts. 2: 319, plate 4. (1845) | Lambert: Descr. Pinus 1: 7, plate 3. (1803) |
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