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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, probably naturalizing in nw San Jacinto Mountains (nw Black Mtn). 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 30 years old (although not yet reproducing), on northwestern flank of Black Mtn, 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 SnGB, 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 Mar 10 2014
Citation for this treatment: [Author of taxon treatment] 2012. Sequoiadendron, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=44178, accessed on Mar 10 2014
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