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    THIS PAGE IS NO LONGER UPDATED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 POLYSTICHUM

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

  1. Leaf generally 1-pinnate; 1° leaflets generally simple, ± entire to serrate, in P. kruckebergii sometimes 1-lobed
 
    2. Leaf 10–15(25) cm; 1° leaflets simple or generally lobed at bases of lowest
2 P. kruckebergii
    2' Leaf 10–120(200) cm; 1° leaflets simple
 
      3. Lowest 1° leaflets ± deltate, ± 1/2 length of longest; petiole 1/6–1/10 blade length
P. lonchitis
      3' Lowest 1° leaflets ovate to lanceolate, ± = to ± 2/3 length of longest; petiole generally 1/5–1/2 blade length
 
        4. Petiole base scales ovate, ± 3(6) mm wide, those above lowest 1° leaflets generally > 1 mm wide, persistent; 1° leaflets generally in 1 plane; indusium ciliate
P. munitum
        4' Petiole base scales lanceolate, ± 2–3 mm wide, those above lowest 1° leaflets generally < 1 mm wide, falling early; 1° leaflets in ± 1 plane or not; indusium ± entire to toothed
P. imbricans
          5. Leaf 15–80 cm; 1° leaflets in ± 1 plane, longest 3–6(10) cm; sori submarginal
subsp. curtum
          5' Leaf 15–50 cm; 1° leaflets often not in ± 1 plane, longest 2–5 cm; sori ± close to midvein
subsp. imbricans
  1' Leaf 1–2-pinnate; 1° leaflets deeply pinnately lobed to 1-pinnate, at least at bases of lowest
 
    6. Leaflet teeth without bristle-like tips; serpentine
P. lemmonii
    6' Leaflet teeth with bristle-like tips; serpentine or not
 
      7. Leaf generally 2- to rarely partly 3-pinnate; 2° leaflets abruptly narrowed to attachment < 0.5 mm wide, often with a lobe on distal side of base; main leaf blade axis with persistent scales
P. dudleyi
      7' Leaf generally 1- to partly 2-pinnate; 2° leaflets gradually tapered to attachment < 3 mm wide, lobes 0; main leaf blade axis with deciduous scales
 
        8. Smallest scales on leaflet lower surface hair-like; blade generally > 5 cm wide
P. californicum
        8' Smallest scales on leaflet lower surface linear, few hair-like; blade generally < 5 cm wide
 
          9. Lowest 1° leaflets ± deltate, longest < 1(–1.5) cm
2 P. kruckebergii
          9' Lowest 1° leaflets ± lanceolate, longest 1.5–3 cm
P. scopulinum


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