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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
1 sp.: California. (Greek: sequoia tree)
Tree, generally not sprouting. Stem: trunk < 90 m, to 11 m diam; old crown irregular, with large branches throughout; bark to ± 60 cm thick near base, fibrous, ridged, red-brown; branches spreading to downswept, ends upturned; twigs persistent < 20 years. Leaf: alternate, green < 4 years, persistent < 20; of 1 kind, appressed, ± 4-ranked, < 15 mm, awl-like. Pollen cone: 4–8 mm, ± spheric to ovoid. Seed cone: 40–90 mm, oblong, woody, maturing in 2 years, persistent < 20; scales peltate, fused to bracts. Seed: 3–9 per scale, 3–6 mm, wings 2, unequal, lateral.
n=11. Uncommon. Mixed-conifer forest, especially with favorable soil moisture; 825–2700 m. High Sierra Nevada, naturalized in northwestern San Jacinto Mountains (Black Mountain), possibly naturalizing in San Gabriel Mountains, San Bernardino Mountains. Most massive trunks in North America. [Online Interchange]
Unabridged note: Schmid & Schmid (2011. Madroño 58:202–203; 2012. Aliso 30:19–32) rigorously documented that at least 157 plants (seedlings to saplings), some up to 40 years old (and reproducing), on northwestern flank of Black Mountain, northwestern San Jacinto Mountains, have descended naturally from plantings made nearby in 1974, and suggested that the same may occur from planted plants that are persisting in San Gabriel Mountains, San Bernardino Mountains.
Previous taxon: Sequoiadendron
Next taxon: Thuja
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 25 2015
Citation for this treatment: [Author of taxon treatment] 2013. Sequoiadendron, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=44178, accessed on Nov 25 2015
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Jo-Ann Ordano © 2005 California Academy of Sciences
|Geographic subdivisions indicated for the distribution of Sequoiadendron giganteum|| 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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