Jepson Flora Project: Jepson Interchange    
 

The Jepson Manual: Higher Plants of California

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to ERIOPHYLLUM

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

  1. Annual
 
    2. Peduncles < 5 mm
 
      3. Heads radiate
E. multicaule
      3' Heads discoid
 
        4. Leaf weakly rolled under, tips sharp-pointed; phyllaries 3–4
E. mohavense
        4' Leaf strongly rolled under, tips rounded; phyllaries 6–8
E. pringlei
    2' Peduncles > 5 mm
 
      5. Anther tips awl-like; disk corolla lobes glandular; ligules white or yellow
 
        6. Pappus of alternating long and short scales; fruit 2.5–4.5 mm; ligules white
E. lanosum
        6' Pappus 0 or of ± = scales; fruit ± 2 mm; ligules cream-colored to yellow
E. wallacei
      5' Anther tips deltate; disk corolla lobes nonglandular; ligules yellow
 
        7. Pappus 0 or of minute scales; anther tips glabrous; s Sierra Nevada, s East of Sierra Nevada, Desert
E. ambiguum
          8. Disk corolla lobes glabrous; pappus of minute scales
var. ambiguum
          8' Disk corolla lobes with 1-celled hairs; pappus generally ± 0
var. paleaceum
        7' Pappus of scales > 0.5 mm; anther tips glandular; c Sierra Nevada (Mariposa Co.)
 
          9. Branches open, spreading; ligules > 2 mm; < 1900 m
E. congdonii
          9' Branches strictly ascending; ligules < 2 mm; > 1800 m
E. nubigenum
  1' Subshrub or shrub
 
    10. Heads (including ligules) < 15 mm diam, generally ± densely clustered
 
      11. Ray flowers (0)6–9; leaves 3–20 cm; phyllaries 8–12; coastal
 
        12. Leaves 8–20 cm; ligules ± 2 mm; pappus scales > 1 mm; s Channel Islands
E. nevinii
        12' Leaves 3–7 cm; ligules (0)3–5 mm; pappus scales < 1 mm; mainland, n Channel Islands
E. staechadifolium
      11' Ray flowers (0)4–6; leaves 1–7 cm; phyllaries 4–8; especially inland
 
        13. Heads generally 10–30+, dense; ligules 2–5 mm; ray flowers (0)4–6; fruits generally < 35; common
E. confertiflorum var. confertiflorum
        13' Heads 1–10, loose; ligules generally 5–10 mm; ray flowers generally 5–9; fruits generally 30–75; possibly local derivatives of E. confertiflorum × E. lanatum
 
          14. Subshrub; leaf lobes ± triangular, deep; phyllaries barely overlapping — cw San Francisco Bay Area
E. latilobum
          14' Shrub; leaf lobes ± linear, almost to midrib; phyllaries clearly overlapping
 
            15. Leaves ± obovate; peduncles < 3 cm; ray flowers (0)4–6; ligules 4–5 mm; c Sierra Nevada Foothills
E. confertiflorum var. tanacetiflorum
            15' Leaves ovate; peduncles 4–14 cm; ray flowers generally 6–8; ligules 6–10 mm; e Central Western California
E. jepsonii
    10' Heads (including ligules) 15–45 mm diam, 1 or loosely clustered
 
      16. Ray flowers (0 or 4) generally 5–9; ligules generally 5–10 mm; involucres 4–7 mm; possibly derivatives of E. confertiflorum × E. lanatum (see 13')
 
      16' Ray flowers (0) generally 8–13; ligules 6–20 mm; involucres 5–12 mm; widespread complex
E. lanatum
        17. Tube of disk flowers glabrous; rare, Tehachapi Mountain Area, Outer South Coast Ranges
var. hallii
        17' Tube of disk flowers very glandular or hairy; widespread
 
          18. Ray flowers generally 8(5–10); phyllaries 5–10, strongly keeled; leaves generally entire to 3-lobed, margins flat
var. integrifolium
          18' Ray flowers generally 9–13; phyllaries generally 9–13, keeled or flat; leaves entire to nearly compound, margins flat or rolled under
 
            19. Leaves densely woolly above and below, entire or coarsely toothed (especially above middle), margins flat
 
              20. Fruit hairy; ligules 7–10 mm; Klamath Ranges
var. lanceolatum
              20' Fruit glabrous; ligules 6–7 mm; s Sierra Nevada, San Bernardino Mountains
var. obovatum
            19' Leaves less hairy (often green) above, entire to nearly compound, margins rolled under
 
              21. Leaves narrowly oblanceolate or wider, serrate to sharply lobed, glabrous above; pappus 0 or minute; peduncles 30–100 mm; ligules golden-yellow
 
                22. Leaves often diamond-shaped, lower sharply 3–5-lobed, woolly-tufted below; coastal
var. arachnoideum
                22' Leaves often obovate, coarsely serrate or lobed distally, silky-woolly below; Sierra Nevada
var. croceum
              21' Leaves linear to ovate, entire to 2-compound, often woolly-tufted above; pappus 0.5–1.5 mm; peduncles 30–300 mm; ligules yellow
 
                23. Leaves 1–3 cm, lobed to ± 2-pinnately compound; peduncles 30–100 mm, slender; involucres 6–8 mm; ligules 6–9 mm
var. achillaeoides
                23' Leaves 3–8 cm, entire to pinnately lobed; peduncles 100–300 mm, generally swollen beneath heads; involucres 8–10 mm; ligules 10–20 mm
var. grandiflorum


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