Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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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]

PSEUDOTSUGA

DOUGLAS-FIR


Stem: young crown conic; branches appearing ± whorled in young plants, smaller ± drooping; young bark smooth, with resin blisters, mature bark thick, deeply furrowed, dark brown; leaf scars ± smooth, round, slightly raised above twig surface on persistent leaf bases; bud < 15 mm, fusiform
Leaves persistent < 8 years, 2–4.5 cm, tapered to a short petiole above persistent base, ± spreading, ± flat, with 2 whitish bands on lower surface
Seed cone pendent, 4–20 cm, maturing 1st season, persistent or deciduous; stalk < 2 cm; bract ± exserted, 3-toothed or -lobed at tip, free from scale
Seed plus wing < 25 mm
Species in genus: 4 species: North America, Asia
Etymology: (Latin & Japanese: false hemlock)

Native

P. macrocarpa (Vasey) Mayr

BIGCONE DOUGLAS-FIR, BIGCONE SPRUCE


Stem: trunk < 44 m, < 2.1 m wide, strongly tapered; mature crown rounded to flat; often with many large, lower branches
Leaves 2–4.5 cm
Seed cone 9–20 cm, sometimes persistent several years; bracts little exserted except for central tooth or lobe
Ecology: Scattered on fire-resistant slopes, mixed-evergreen forest
Elevation: 200–2400 m.
Bioregional distribution: s Outer South Coast Ranges, Transverse Ranges, Peninsular Ranges
Horticultural information: DRN: 3, 4, 5, 6, 7, 14, 15, 16, 17 &IRR: 2, 8, 9, 10, 11, 18, 19, 20, 21, 22, 23.

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bioregional map for PSEUDOTSUGA%20macrocarpa being generated
 


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