Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
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.
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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 OregonHorticultural information: DRN, IRR: 2, 3, 4, 5, 6, 15, 16, 17.
| 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). |
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