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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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PINACEAE

PINE FAMILY

James R. Griffin

Tree or shrub, monoecious, evergreen
Stem: young crown conic; twig not grooved, resinous, generally persistent
Leaves simple, generally alternate, sometimes in bundles or appearing ± 2-ranked, linear or awl-like; bases decurrent, sometimes woody, persistent several years
Pollen cone generally < 6 cm, not woody, deciduous
Seed cone generally woody; bracts, scales generally persistent; scale not peltate, fused to or free from subtending bract
Seeds 2, on upper side of scale base
Genera in family: 10 genera, 193 species: mostly n hemisphere; many of great commercial value, supplying > half of world's timber
Reference: [Price 1989 J Arnold Arbor 70:247–305]

PINUS

PINE


Stem: young crown conic, mature crown often rounded or flat; branches ± whorled in young plants; young bark smooth, mature bark furrowed; bud ± conic, generally resinous
Leaves generally 2.5–35 cm, generally sessile, in bundles of 1–5; bundles solitary in axils of alternate, awl-like bracts, each bundle enclosed at base in a sometimes deciduous sheath of bracts, generally persistent several seasons
Seed cones often whorled, generally maturing and opening 2nd season, sometimes persistent on stem; stalk 0 or < 16 cm; bract included, fused to scale, minute; scale tip reflexed and elongated 3–7 cm, or often with a rounded or angled, often prickled knob < 3 cm
Seed: coat hard, sometimes woody
Chromosomes: 2n=24 for all reports
Species in genus: 94 species: n hemisphere
Etymology: (Latin: pine)
Reference: [Millar & Critchfield 1988 Madroño 35:39–53]

Native

P. contorta Loudon

LODGEPOLE PINE


Stem: mature bark scaly, thin; trunk 2–34 m (extremely variable at maturity)
Leaves 2 per bundle, 2.5–8.6 cm; sheath persistent
Seed cone pendent, < 6 cm, brown; stalk ± 0; scale tip knobs < 5 mm, angled, prickled
Ecology: Coastal to subalpine forest
Elevation: < 3500 m.
Bioregional distribution: North Coast, Klamath Ranges, High Cascade Range, High Sierra Nevada, San Gabriel Mountains, San Bernardino Mountains, San Jacinto Mountains, Great Basin Floristic Province
Distribution outside California: to Alaska, South Dakota, n Baja California

Native

subsp. contorta

SHORE PINE


Stem: trunk generally < 15 m
Seed cone asymmetric, persisting on stem for many years
Ecology: Coastal dunes, bluffs lacking claypan, hardpan
Elevation: < 150 m.
Bioregional distribution: North Coast
Distribution outside California: to Alaska

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bioregional map for PINUS%20contorta%20subsp.%20contorta being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Pinus contorta subsp. contorta
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