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Key to families | Table of families and genera

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Jim A. Bartel, except as noted

Shrub, tree, generally evergreen; monoecious or dioecious. Leaf: simple, cauline, alternate or opposite (either ± 4-ranked) or whorled in 3s (6-ranked), linear or scale-, awl- or needle-like (sometimes linear and awl-like on 1 plant, or on juvenile or injured plants), generally decurrent, covering young stems. Pollen cone: axillary or terminal. Seed cone: ± fleshy to generally woody, generally hard at maturity; scales opposite or whorled, peltate or not. Seed: 1–many per scale, angled or lateral winged, generally wind-dispersed.
30 genera, 130+ species: ± worldwide, especially North America, Eurasia. [Farjon 2005 Monogr Cupressaceae Sciadopitys. RBG, Kew] Incl (paraphyletic) Taxodiaceae. Taxa of (polyphyletic) Cupressus in TJM (1993) now in Callitropsis, Chamaecyparis, Hesperocyparis. —Scientific Editor: Thomas J. Rosatti.

Key to Cupressaceae

Single-trunked tree, pyramidal in youth; monoecious. Stem: young shoots flat, in drooping or pendent clusters, in 1 plane. Leaf: opposite, 4-ranked, scale-like, overlapping, of 2 kinds (facials smaller, appressed, laterals with tips spreading above facials). Pollen cone: terminal. Seed cone: 5–14 mm, woody, ± spheric to widely cylindric, maturing 1st year, open at maturity; scales 8–12, peltate, abutting, shield- or wedge-shaped, projection generally present, <= 1 mm, pointed, base depressed from edge. Seed: (1)2–5(7) per scale, flat, wings 2, narrow; cotyledons 2.
5 species: western and eastern North America, eastern Asia. (Greek: dwarf or on-the-ground cypress) [Farjon 2005 Monograph Cupressaceae Sciadopitys. RBG, Kew]

C. lawsoniana (A. Murray bis) Parl. PORT ORFORD CEDAR, LAWSON CYPRESS
Tree 20–65 m. Stem: trunk < 6 m diam; bark 15–25 cm thick, red-brown to tan, fibrous, fire-resistant; young shoots flat, 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: yellow-green, becoming dark red to purple black. Seed cone: 6–11 mm, spheric, red-brown; scales 7–10, projection ± 0. Seed: 2–5 per scale, 2–4 mm, generally with wart-like pitch pockets, light chestnut-brown, generally glandular.
Coastal conifer, mixed-evergreen, yellow-pine forests, often on serpentine; < 1700 m. Klamath Ranges; southwestern Oregon. [Cupressus lawsoniana A. Murray bis] [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 27 2015
Citation for this treatment: [Author of taxon treatment] 2013. Chamaecyparis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 27 2015

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Geographic subdivisions indicated for the distribution of Chamaecyparis lawsoniana Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.