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    THIS PAGE IS NO LONGER UPDATED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 DODECATHEON

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

  1. Stigma enlarged, >> style in width; tissue at base of anther wrinkled, dark maroon to black; filaments < 1.5 mm, free or joined by a thin membrane but not fused into a tube
 
    2. Corolla tube generally covering anther bases; anthers 5, tips acute; plant densely glandular-hairy
D. redolens
    2' Corolla tube not covering anther bases; anthers generally 4, tips truncate to obtuse; plant glabrous to glandular-hairy
 
      3. Leaf linear to linear-oblanceolate, 2–20 cm; stem glabrous; inflorescence glabrous to sometimes ± glandular-hairy; fruit with valves
D. alpinum
      3' Leaf linear-oblanceolate to oblanceolate, 9–50 cm; stem glandular-hairy; inflorescence glandular-hairy; fruit circumscissile or with valves, sometimes both on same plant
D. jeffreyi
  1' Stigma not much enlarged, ± = style in width; tissue at base of anther smooth or wrinkled, yellow or dark; filaments 1–4 mm, fused into a tube, sometimes < 1.5 mm and free
 
    4. Tissue at anther base smooth (often longitudinally wrinkled upon drying); fruit circumscissile or with valves
 
      5. Corolla lobe generally 9–14 mm, magenta to lavender; roots white, without bulblets; fruit with valves
D. pulchellum
      5' Corolla lobe generally 5–9 mm, magenta to white; roots reddish, with many bulblets; fruit circumscissile
2 D. subalpinum
    4' Tissue at anther base transversely wrinkled; fruit circumscissile
 
      6. Leaf blade generally tapered gradually to petiole, length generally > 2.5 × width (if blade narrowed abruptly, filament tube < 1.5 mm and yellow to dark, smooth)
 
        7. Anther 5–9 mm; filament 0.5–1.5 mm, free or fused into a tube; corolla lobe generally 7–20 mm
D. conjugens
        7' Anther 3–4 mm; filament 2–3.5 mm, fused into a tube; corolla lobe generally 5–9 mm
2 D. subalpinum
      6' Leaf blade generally narrowed abruptly to petiole, length generally < 2.5 × width; filament tube 1–4 mm, dark, generally wrinkled
 
        8. Leaf blade length generally < 2 × width; filament tube generally < 3 mm wide; bulblets present among roots at flowering
D. hendersonii
        8' Leaf blade length generally > 2 × width; filament tube generally 3–4 mm wide; bulblets 0
D. clevelandii
          9. Tissue at base of anther completely yellow; filament tube lacking yellow or white spot below each anther, sometimes entirely yellow
subsp. clevelandii
          9' Tissue at base of anther maroon to black; filament tube sometimes with yellow or white spot below each anther
 
            10. Filament tube lacking yellow or white spot below each anther
subsp. insulare
            10' Filament tube with yellow or white spot below each anther
 
              11. Anther dark maroon or purple, tip obtuse to notched
subsp. patulum
              11' Anther generally yellow, tip acute to obtuse
subsp. sanctarum


Comments or questions on page
University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites |

Copyright by the Regents of the University of California