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Key to families | Table of families and genera
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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
Stem: trunk generally flared at base; branches spreading to ± pendent, tips often upturned; young shoots 4-sided, in flat clusters, held horizontally. Leaf: opposite, 2-ranked, ± not appearing whorled in 4s, closely appressed, scale-like, exposed part ± as long as wide. Pollen cone: terminal. Seed cone: erect to reflexed, woody, ovoid-oblong, tapered to point, maturing 1st year; scales in 4–6 pairs, ± overlapping, sharp-pointed near tip, thin, oblong, acute, leathery, middle 2–3 pairs fertile. Seed: (1)2 per fertile scale, wings 2, ± equal; cotyledons 2.
5 species: northern North America, eastern Asia. (Greek: resinous tree)
Tree 30–70 m. Stem: bark 1–2 cm thick, cinnamon-red, fibrous; young shoot upper surface glossy dark green, lower surface generally faintly white-streaked. Pollen cone: red-brown turning dark gray. Seed cone: 10–19 mm, light brown. Seed: 4–6 mm, narrow, elliptic, light brown.
n=11. Coastal conifer forest; < 1800 m. North Coast, Klamath Ranges, Outer North Coast Ranges (Del Norte, Humboldt cos.); to Alaska, Montana. [Online Interchange]
Previous taxon: Thuja
Next taxon: Ephedraceae
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Aug 5 2015
Citation for this treatment: [Author of taxon treatment] 2013. Thuja, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=46527, accessed on Aug 5 2015
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© 1995 Saint Mary's College of California
|Geographic subdivisions indicated for the distribution of Thuja plicata|| 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.
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(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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