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Key to families | Table of families and genera

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Jim A. Bartel, except as noted

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

Large shrub, 1- or multi-trunked tree, often pyramidal in youth; monoecious. Stem: young shoots or branches generally cylindric (sometimes ± 4-angled or flat), generally in 3-dimensional clusters. Leaf: opposite, 4-ranked, of 1 kind, scale-like, closely appressed, overlapping. Pollen cone: terminal, 2–6.5 mm, 1.3–3 mm diam, generally yellow. Seed cone: 10–50 mm, woody, ± spheric to widely cylindric, maturing 2nd year, generally closed and attached beyond maturity (> 2 years); scales (4)6–12, peltate, abutting, shield- or wedge-shaped, projection generally > 1 mm especially 1st year, pointed, base level with or rising from edge. Seed: 60–150 per cone, flat, wings generally 2, vestigial; cotyledons generally 3–5.
16 species: western and central North America, Central America. (Greek: western cypress) [Adams & Bartel 2009 Phytologia 91:287–299; Adams et al. 2009 Phytologia 91:160–185; Little 2006 Syst Bot 31:461–480]
Unabridged references: [Bartel et al. 2003 Biochem Syst Ecol 31:693–702]

Key to Hesperocyparis

Tree 7–30(40) m. Stem: bark peeling in irregular plates, ± red- or cherry-brown, aging gray-brown; ultimate branches 0.7–1 mm diam, cylindric. Leaf: dark to gray-green, resin not copious. Pollen cone: 2–3 mm, generally spheric; scales 6–10; pollen sacs 3–5 per scale. Seed cone: 10–18(25) mm, spheric; surface warty, silvery to dull brown; scales 4–8. Seed: (2.4)3–4 mm, generally glaucous, tan to dull red-brown, generally with many wart-like pitch pockets; attachment scar conspicuous.
Mixed-evergreen forest, open slopes, flats, often on serpentine; 1100–1800 m. Klamath Ranges, High Cascade Range, n High Sierra Nevada, Modoc Plateau; southwestern Oregon. [Callitropsis bakeri (Jeps.) D.P. Little; Cupressus bakeri Jeps.; Cupressus bakeri subsp. bakeri, Modoc cypress; Cupressus bakeri subsp. matthewsii C.B. Wolf, Siskiyou cypress] [Online Interchange] {CNPS list}

Previous taxon: Hesperocyparis abramsiana var. butanoensis
Next taxon: Hesperocyparis forbesii


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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 29 2015
Citation for this treatment: [Author of taxon treatment] 2013. Hesperocyparis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 29 2015

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Geographic subdivisions indicated for the distribution of Hesperocyparis bakeri 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.
map of distribution 1
(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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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.