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 RIBES

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

  1. Nodal spines 0 (subg. Coreosma)
 
    2. Hypanthium disk- or saucer-shaped, barely exceeding ovary
 
      3. Leaves evergreen, lobes 0 or very shallow; Peninsular Ranges, s Channel Islands (Santa Catalina Island)
R. viburnifolium
      3' Leaves deciduous, lobes deep; mainland
 
        4. Ovary and leaf blade lower side with stalked glands; stem spreading or decumbent
R. laxiflorum
        4' Ovary and leaf blade lower side with sessile glands; stem ± erect
 
          5. Sepals green; North Coast, w Klamath Ranges, Outer North Coast Ranges
R. bracteosum
          5' Sepals white; n Modoc Plateau
R. hudsonianum var. petiolare
    2' Hypanthium cup- to tube-shaped, clearly exceeding ovary
 
      6. Sepals yellow
R. aureum
        7. Flower odor spicy; petals yellow turning orange; sepals 5–8 mm
var. aureum
        7' Flower odor 0; petals yellow turning deep red; sepals 3–4 mm
var. gracillimum
      6' Sepals white or whitish green to pink, red, or purple
 
        8. Anther tip with cup-like depression
 
          9. Hypanthium < 2 × longer than wide; stamens inserted at level of petals; fruit black to glaucous
R. viscosissimum
          9' Hypanthium > 2 × longer than wide; stamens inserted below level of petals; fruit red
R. cereum
            10. Bract tip wide, with several prominent teeth; styles generally hairy
var. cereum
            10' Bract tip acute, with 1–3 shallow teeth on each side; styles glabrous
var. inebrians
        8' Anther tip rounded, blunt, or shallowly notched
 
          11. Styles glabrous at base
 
            12. Sepals erect; hypanthium ± as long as wide
R. nevadense
            12' Sepals spreading; hypanthium longer than wide
R. sanguineum
              13. Inflorescence pendent; sepals pink to white
var. glutinosum
              13' Inflorescence erect to spreading; sepals red
var. sanguineum
          11' Styles hairy, at least at base
 
            14. Hypanthium wider than long; styles free to base; inflorescence dense, many-flowered, spike- or head-like
R. canthariforme
            14' Hypanthium ± longer than wide; styles fused at least in basal 1/2; inflorescence open
 
              15. Hypanthium white, barely longer than wide
R. indecorum
              15' Hypanthium pink, ± 2 × longer than wide
R. malvaceum
                16. Leaf blade upper surface dull olive-green
var. malvaceum
                16' Leaf blade upper surface bright green
var. viridifolium
  1' Nodal spines present (sometimes 0 on some shoots)
 
    17. Inflorescence generally > 5-flowered; hypanthium disk- or saucer-shaped; pedicel jointed to ovary (subg. Grossularioides)
 
      18. Leaf hairs 0 or sparse, nonglandular; fruit black
R. lacustre
      18' Leaf hairy, glandular; fruit orange-red
R. montigenum
    17' Inflorescence < 5-flowered; hypanthium cup- to tube-shaped; pedicel not jointed to ovary (subg. Grossularia)
 
      19. Sepals 4, erect
R. speciosum
      19' Sepals 5, spreading or reflexed
 
        20. Anthers not exserted from petals
 
          21. Stem low, spreading; internode bristles glandular
R. tularense
          21' Stem erect or arched; internode bristles 0
 
            22. Ovary hairs conspicuous, short and long, glandular and not
R. velutinum
            22' Ovary hairs generally 0 or inconspicuous, generally short, generally nonglandular
 
              23. Hypanthium > 3 mm; 2100–3100 m
R. lasianthum
              23' Hypanthium < 3 mm; < 1350 m
R. quercetorum
        20' Anthers exserted from petals
 
          24. Styles hairy at least at base
 
            25. Calyx purple or purple-green; filaments exceeding petals by < 2 mm
R. divaricatum
              26. Petals pink or red; styles 8–11 mm
var. parishii
              26' Petals white; styles 5–8 mm
var. pubiflorum
            25' Calyx greenish white, purple at base or not; filaments exceeding petals by > 3 mm
R. inerme
              27. Leaf hairs 0 to sparse, short, soft; sepal hairs 0
var. inerme
              27' Leaf hairs sparse to dense, long, soft to stiff; sepal hairs soft
var. klamathense
          24' Styles glabrous at base
 
            28. Petals bright yellow, outer surface deeply concave, tip hooded
R. marshallii
            28' Petals white to pink, flat or outer surface shallowly concave or margins curled inward, sometimes nearly touching, tip not hooded
 
              29. Petals flat or outer surface shallowly concave; stem low, spreading
R. binominatum
              29' Petal margins curled inward, sometimes nearly touching; stem ± erect
 
                30. Anthers oblong, tips blunt or rounded; styles ± not exceeding anthers
 
                  31. Anthers slightly longer than wide when dehisced, with sessile glands on back; internodal bristles 0
R. lobbii
                  31' Anthers much longer than wide when dehisced, glabrous; internodal bristles present
R. sericeum
                30' Anthers lanceolate to ovate, tips acute or with a point; styles exceeding anthers
 
                  32. Leaf blade lower surface glandular
 
                    33. Internodal bristles 0; hypanthium longer than wide
R. amarum
                    33' Internodal bristles present; hypanthium generally ± as long as wide
 
                      34. Sepals purple; fruit purple
R. menziesii
                      34' Sepals greenish white; fruit yellow
R. victoris
                  32' Leaf blade lower surface nonglandular
 
                    35. Hypanthium ± as long as wide
R. californicum
                      36. Leaf hairs 0 or sparse; stamens > 2 × petals
var. californicum
                      36' Leaf hairy; stamens ± = to barely > petals
var. hesperium
                    35' Hypanthium longer than wide
 
                      37. Sepals pinkish, spreading; n Channel Islands (Santa Cruz Island)
R. thacherianum
                      37' Sepals purple, reflexed; mainland
R. roezlii
                        38. Leaf blade lower surface and hypanthium glabrous
var. cruentum
                        38' Leaf blade lower surface and hypanthium hairy or densely white-hairy
 
                          39. Hypanthium and leaf blade lower surface densely white-hairy
var. amictum
                          39' Hypanthium and leaf blade lower surface hairy
var. roezlii


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