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

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Jim A. Bartel

Shrub, tree, evergreen, monoecious or dioecious
Leaves cauline, opposite and 4-ranked or whorled in 3's and 6-ranked, generally scale-like, decurrent, completely covering young stems
Pollen cone small, axillary or terminal
Seed cone ± fleshy to woody, generally hard at maturity; scales opposite or whorled
Seeds 1–many per scale, generally angled or winged, generally wind-dispersed
Genera in family: 17 genera, ± 120 species: worldwide; all North America genera cultivated
Reference: [Elias 1980 Complete Trees North America]
Juvenile leaves needle- or awl-like, sometimes present in ± mature plants, especially in response to grazing or infection, especially in Cupressus, Juniperus.



Large shrub, tree, often pyramidal in youth, monoecious
Stem: young shoots generally cylindric (sometimes 4-angled or flat), generally arrayed in 3-dimensional clusters
Leaves opposite, 4-ranked, scale-like, closely appressed, overlapping
Pollen cone generally yellow
Seed cone 6–50 mm, woody, ± spheric to widely cylindric, maturing 1st or 2nd year, often closed > 2 years; scales 6–12, peltate, abutting, shield- or wedge-shaped; projection often present, small, pointed, generally less visible in age
Seeds 2–many per scale, flat, winged; cotyledons 2–5
Chromosomes: 2n=22 for all reports
Species in genus: ± 22 species: w North America, Eurasia
Etymology: (Latin: cypress)
Reference: [Wolf 1948 Aliso 1:1–250]


C. lawsoniana A. Murray bis


Tree 20–65 m, pyramidal in youth
Stem: trunk < 6 m diam; bark 15–25 cm thick, red-brown to tan, fibrous, fire-resistant; young shoots flat, arrayed in flat clusters, held ± horizontally, lower surfaces often paler
Leaf green, generally glaucous; glands generally visible; lateral leaf tips generally curved toward stem axis
Pollen cone 2–3 mm, 2–3 mm diam, oblong, pink to red; scales 5–6; pollen sacs 2 per scale
Seed cone 6–10 mm, spheric, red-brown; scales 7–10, projection ± 0
Seeds 2–5 per scale, 2–4 mm, generally with wart-like pitch pockets, light chestnut-brown, generally glandular
Ecology: UNCOMMON. Coastal conifer, mixed-evergreen, yellow-pine forests, often on serpentine
Elevation: < 1700 m.
Bioregional distribution: North Coast, Klamath Ranges, Outer North Coast Ranges
Distribution outside California: sw Oregon
Synonyms: Chamaecyparis l. (A. Murray bis) Parl
Horticultural information: IRR: 1, 2, 4, 5, 6, 15, 16, 17, 24 &SHD: 3, 7, 14, 18, 19, 20, 21, 22, 23; CVS
Recent taxonomic note: Chamaecyparis lawsoniana (A. Murray) Parl.

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