Jepson Flora Project: Jepson Interchange    
 

The Jepson Manual: Higher Plants of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to CUPRESSUS

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Young shoots in flat clusters; seeds 2–5 per scale, wing prominent; seed cone 6–12 mm, opening in 1–2 years (subg. Chamaecyparis)
 
    2. Bark 15–25 cm thick, fibrous; seed cone scales generally 7–10; leaf glands generally visible; leaf generally glaucous
C. lawsoniana
    2' Bark 1–2 cm thick, scaly; seed cone scales generally 4–6; leaf glands generally obscure; leaf not glaucous
C. nootkatensis
  1' Young shoots generally in 3-dimensional clusters (except sometimes C. macnabiana); seeds > 5 per scale, wing ± obscure; seed cone 10–50 mm, opening in 2 or more years or generally closed indefinitely (subg. Cupressus)
 
    3. Outer leaf surface generally with conspicuous gland or pit, generally covered with resin that dries clear to white to gray; leaf dull to gray-green, often appearing bluish gray
 
      4. Young shoots in flat clusters; leaf pungent-scented; resin copious, sticky when fresh
C. macnabiana
      4' Young shoots in 3-dimensional clusters; leaf light-scented; resin neither copious nor sticky
 
        5. Youngest shoots 0.5–1 mm diam; pollen cone 2–3 mm, scales 6–10; seed 3–4 mm; n California
C. bakeri
        5' Youngest shoots 1–2 mm diam; pollen cone (2)3–5 mm, scales 8–16; seed (3)4–8 mm; s California
C. arizonica
          6. Bark smooth, peeling in thin strips or plates; seed cone scale projection 2–4 mm; leaf glands generally inactive, sometimes inconspicuous or 0; Peninsular Ranges
subsp. arizonica
          6' Bark fibrous, not peeling; seed cone scale projection ± 0; leaf glands active, conspicuous; s High Sierra Nevada
subsp. nevadensis
    3' Outer leaf surface without conspicuous gland or pit, generally not covered with resin (see also 6. above; C. sargentii has resin, some glands or pits); leaf bright green to dusty green, not grayish
 
      7. Bark of large branches and trunks cherry-red to mahogany-brown, smooth, polished, not fibrous, peeling in thin plates; small tree generally without dominant terminal shoot; s California
C. forbesii
      7' Bark of large branches and trunks not cherry-red to mahogany-brown, generally fibrous, not peeling in thin plates; small to large tree with dominant terminal shoot; n&c California
 
        8. Leaf dull, dusty green, glaucous or not; serpentine; North Coast Ranges, San Francisco Bay Area, South Coast Ranges
C. sargentii
        8' Leaf bright or dark green, not glaucous; not on serpentine; North Coast, Central Coast, San Francisco Bay Area
 
          9. Crown asymmetric, often open, flat-topped to widely conic; young shoots 1.5–2.5 mm diam; widely planted and naturalized
C. macrocarpa
          9' Crown symmetric, often dense, generally pyramidal; young shoots 1–1.5 mm diam; not widely planted and naturalized
 
            10. Seed 3–5 mm, brown, glaucous or not, attachment scar conspicuous; seed cone generally 15–30 mm, spheric to generally widely cylindric; San Francisco Bay Area (Santa Cruz Mtns)
C. abramsiana
            10' Seed 2–4 mm, dark brown to black, not glaucous, attachment scar often inconspicuous; seed cone 10–20(25) mm, ± spheric; North Coast, Central Coast
C. goveniana
              11. Tree 5–7 m, terminal shoot not long and whip-like; leaf light to yellow-green; Central Coast
subsp. goveniana
              11' Tree 1–2 m on sterile soil (10–50 m on rich soil), terminal shoot long, whip-like; leaf generally dark dull green; North Coast
subsp. pigmaea


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