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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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]



Stem: crown conic; young branches appearing whorled, sometimes drooping; bark thin, scaly; twig glabrous or hairy; leaf bases spreading, peg-like, < 2 mm, persistent; bud conic to ovoid, resinous
Leaves often crowded toward upper side of twigs, generally < 3 cm, sessile, ± 4-angled or flat, stiff, often strong-smelling when crushed
Seed cone sometimes conspicuously terminal, pendent, 5–12 cm, maturing 1st season; stalk 0–1 cm; bract included, free from scale
Seed: wing terminal
Chromosomes: 2n=24 for all reports
Species in genus: 34 species: n hemisphere
Etymology: (Latin: pitch)
Trunks, especially of P. sitchensis , more flared or buttressed at base than other CA conifers.


P. breweriana S. Watson


Stem: trunk < 53 m, < 1.3 m wide; branches drooping, sometimes to ground; twig hairy
Leaf < 3 cm, flexible; upper surface ± flat, generally with 2 faint, whitish bands; tip blunt
Seed cone < 12 cm, oblong; scale woody, margin ± entire; bract < 1/4 scale
Ecology: Uncommon. Cool, moist, forested slopes
Elevation: 560–2300 m.
Bioregional distribution: Klamath Ranges
Distribution outside California: sw Oregon
Horticultural information: DRN, IRR: 2, 3, 4, 5, 6, 15, 16, 17.

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bioregional map for PICEA%20breweriana 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 Picea breweriana
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