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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

TSUGA HEMLOCK
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.
2n=24.
10 species: northern hemisphere. (Japanese: hemlock)

Key to Tsuga

1. Leaves ± 2-ranked, not more crowded above twig, grooved adaxially, with 2 ± white bands abaxially; seed cone 1.2–2.5 cm ..... T. heterophylla

1' Leaves not 2-ranked, more crowded above twig, rounded adaxially, glaucous, with 2 ± white bands abaxially, adaxially; seed cone 3–7.5 cm ..... T. mertensiana

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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