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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Shrub, tree, evergreen; monoecious. Stem: young crown conic; twig not grooved, resinous, generally persistent. Leaf: simple, generally alternate, sometimes in bundles or appearing ± 2-ranked, linear or awl-like; base decurrent, woody or not, persistent several years. Pollen cone: generally < 6 cm, not woody, deciduous. Seed cone: generally woody; bracts, scales generally persistent; scale not peltate, fused to or free from subtending bract. Seed: 2, on scale base adaxially.
10 genera, 193 species: generally northern hemisphere; many of great commercial value, supplying > 1/2 of world's timber. —Scientific Editors: Thomas J. Rosatti, Bruce G. Baldwin.
Unabridged references: [Thieret 1993 FNANM 2:352–398]
Key to Pinaceae
Stem: crown conic, top slender, generally nodding; branches ± drooping; bark red-brown; twig with persistent, peg-like leaf bases, hairy or puberulent; bud ovoid. Leaf: 5–25 mm, tapered to a short petiole above persistent base, spreading, ± 2-ranked or not, ± flat, grooved adaxially or not, ridged abaxially. Seed cone: pendent, 1.2–7.5 cm, ovoid to oblong, opening 1st year; stalk ± 0; bract included, free from scale. Seed: plus wing < 2 cm.Key to Tsuga
10 species: northern hemisphere. (Japanese: hemlock)
Stem: trunk < 50 m, < 2.7 m wide; mature bark thin, red-brown, grooves narrow, ridges wide; twig hairy. Leaf: 5–20 mm, persistent 4–7 years; tip blunt to rounded.
Scattered in northern coastal conifer to mixed-evergreen forests; generally < 700 m. North Coast, w Klamath Ranges, Outer North Coast Ranges; to Alaska, Montana. [Online Interchange]
Previous taxon: Tsuga
Next taxon: Tsuga mertensiana
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 6 2015
Citation for this treatment: [Author of taxon treatment] 2013. Tsuga, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47422, accessed on Jul 6 2015
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J. E.(Jed) and Bonnie McClellan © 2005 California Academy of Sciences
|Geographic subdivisions indicated for the distribution of Tsuga heterophylla|| 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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