Jepson Flora Project: Jepson Interchange    

 
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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]

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. menziesii (Mirbel) Franco var. menziesii

DOUGLAS-FIR


Stem: trunk < 67 m, < 4.4 m wide; mature crown rounded; with large, upper branches
Leaves 2–4 cm
Seed cone 5–9 cm, deciduous; bracts well exserted
Chromosomes: 2n=26
Ecology: Widespread in mixed-evergreen, mixed-conifer forests
Elevation: < 2200 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, High Cascade Range, n&c High Sierra Nevada, Central Coast, San Francisco Bay Area, n Outer South Coast Ranges
Distribution outside California: to sw British Columbia
Horticultural information: DRN: 4, 5, 6, 15, 16, 17 &IRR: 2, 3, 7 &SHD: 14; CVS.

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bioregional map for PSEUDOTSUGA%20menziesii%20var.%20menziesii being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Pseudotsuga menziesii var. menziesii
Retrieve dichotomous key for Pseudotsuga
Retrieve multiple-entry key (MEKA) for Pseudotsuga
Overlay Consortium of California Herbaria specimen data by county on this map
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