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 RUBUS

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

  1. Leaf ± 5-lobed — shrub, large-flowered, unarmed; fruit finely hairy
R. parviflorus
  1' Leaf, generally 3-lobed or compound, sometimes ± unlobed
 
    2. Main stems 5-angled, stout; leaflets 5 on large leaves; flowers often > 10; escaped from cultivated — prickles generally wide-based, ± curved (0)
 
      3. Leaflets deeply lobed or again compound — inflorescence ± panicle
R. laciniatus
      3' Leaflets toothed
 
        4. Inflorescence a raceme (bracts often leaf-like); leaflets generally widest below middle, green below; sepal tips 1–8 mm
P. pensilvanicus
        4' Inflorescence a panicle; leaflets generally widest above middle, white below; sepal tips generally ± 1 mm
 
          5. Prickles many; common
R. discolor
          5' Prickles 0; uncommon
R. ulmifolius var. inermis
    2' Main stems round, slender to stout; leaflets seldom > 3; flowers generally 1–10 — native
 
      6. Plant ± prostrate; pistils 5–15; prickles often 0 — fruit puberulent; > 750 m
 
        7. Stipules linear; leaf compound, white below; stem not rooting at nodes — prickly
2 R. glaucifolius
        7' Stipules ± ovate; leaf often simple, green below; stem rooting at nodes — Klamath Ranges, High North Coast Ranges
 
          8. Prickles 0; petals white
R. lasiococcus
          8' Prickly; petals generally dull purple to pink (white)
R. nivalis
      6' Plant decumbent to erect; pistils generally > 10; prickles generally present
 
        9. Leaf green below; < 1500 m
 
          10. Mains stems erect; petals ± red; fruit yellow to red; flower bisexual; nw California
R. spectabilis
          10' Main stems clambering; petals white; fruit black; flowers generally unisexual; common, California Floristic Province
R. ursinus
        9' Leaf white below; < 2400 m
 
          11. Plant prostrate to decumbent; stem 2–3 mm diam; pistils < 10; inflorescence prickles few, ± slender, straight
2 R. glaucifolius
          11' Plant arched to erect, stem 4–10 mm diam; pistils generally > 15; inflorescence prickles many, generally ± wide-based, generally curved
R. leucodermis


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