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Peltigera didactyla

PNW Range:
  West sideOccasional
  East sideOccasional
  Immediate coastOccasional
  Alpine or subalpineOccasional
Habitat: Usually in recently disturbed habitats such as roadcuts, clearcuts, trailsides, and recently burned forests; low to high elevations.
Substrate: On soil or soil over rock.
Synonymy: none
Peltigera didactyla - Habit
by B. McCune
Peltigera didactyla - Rhizines
by B. McCune
Peltigera didactyla - Habit
by B. McCune
Peltigera didactyla - Soralia
by B. McCune
Peltigera didactyla - Lower
by B. McCune
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Never
Foliose: Almost always
Crustose: Never
Appressed Foliose: Almost always
Fluffy Foliose or Strappy: Rarely
Dangling Hair: Never
Erect Hair: Never
Appressed Hair: Never
Stalks With Squamules: Never
Stalks: Never
Squamules: Never
Single Holdfast: Never
Dangling Nets: Never
Lobe Width (mm): 10 (± 5)

Upper Surface
Upper Surface Color    (Dry) 
   Pale Gray: Almost always
   Dark Gray: Almost always
   Brown: Sometimes
   Tan: Almost always
Upper Surface Tomentose: Almost always
Upper Surface Pruinose or Scabrid: Never
Upper Surface with Network of Ridges: Never
Upper Surface with Pseudocyphellae: Never
   Upper Surface with Holes into Cavity: Never
Cilia on Margins: Never
Lower Surface (Foliose)
Lower Surface Color    (Dry) 
   Whitish: Almost always
   Pale Gray: Sometimes
   Dark Gray: Almost always
   Black: Almost always
   Brown: Sometimes
   Tan: Sometimes
Veined Below: Commonly
Rhizinate Below: Almost always
   Rhizines Squarrose: Never
Tomentose Below: Sometimes
Cyphellae: Never
Pseudocyphellae Below: Never
Papillae Below: Never

Inside (Medulla) Yellow or Orange: Never
Central Cord: Never
Hollow Stalks or Hollow Lobes: Never
Gelatinous: Never

Green Algae Primary Photobiont: Never
Cyanobacteria Primary Photobiont: Almost always
Internal Cephalodia: Never
External Cephalodia: Never

Sexual Reproduction
Perithecia: Never
Apothecia: Rarely
   Mazaedium: Never
Disk Color    (Dry) 
   Disk Brown or Tan: Almost always

Asexual Reproduction
Isidia: Never
Soredia: Almost always
Lobules: Never