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    THIS PAGE IS NO LONGER UPDATED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 HELENIUM

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

  1. Leaves very narrowly linear, thread-like, not decurrent; annual
H. amarum
  1' Leaves wider, with flat blade, decurrent; annual or perennial herb
 
    2. Leaf margins ± toothed
H. autumnale
      3. Ligules 1.5–2.5 cm; herbage sparsely puberulent or becoming glabrous
var. grandiflorum
      3' Ligules ± 1 cm; herbage densely puberulent and glandular
var. montanum
    2' Leaf margins entire
 
      4. Heads several–many; ligules 4–10 mm (sometimes rays 0); disk corollas generally 4-lobed, 2–2.7 mm; pappus < or = 1 mm
H. puberulum
      4' Heads 1–few; ligules 13–30 mm; disk corollas 5-lobed, 3–5 mm; pappus 1.3–4.5 mm
 
        5. Peduncles sparsely to moderately hairy; pappus generally 1.3–2.7 mm; widespread but generally not North Coast
H. bigelovii
        5' Peduncles generally densely hairy; pappus generally 3–4.5 mm; North Coast
H. bolanderi


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