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Heterodermia leucomela

PNW Range:
  West sideNone
  East sideNone
  Immediate coastRare
  Alpine or subalpineNone
Habitat: Occasional in coastal habitats, particularly windswept headlands, clifftops, and vegetated dunes.
Substrate: Bark and wood, usually on conifers.
Synonymy: none
Heterodermia leucomela - Habit
by B. McCune
Heterodermia leucomela - Habit
by B. McCune
Heterodermia leucomela - Habit
by B. McCune
Heterodermia leucomela - Lower
by B. McCune
Heterodermia leucomela - Habit
by B. McCune
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Never
Foliose: Almost always
Crustose: Never
Appressed Foliose: Sometimes
Fluffy Foliose or Strappy: Almost always
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): 1.25 (± 0.25)

Upper Surface
Upper Surface Color    (Dry) 
   Pale Gray Green: Almost always
   Pale Green: Rarely
   Whitish: Sometimes
   Pale Gray: Sometimes
Upper Surface Tomentose: Never
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: Almost always
Lower Surface (Foliose)
Lower Surface Color    (Dry) 
   Pale Gray Green: Sometimes
   Whitish: Almost always
Veined Below: Never
Rhizinate Below: Sometimes
   Rhizines Squarrose: Never
Tomentose Below: Never
Cyphellae: Never
Pseudocyphellae Below: Sometimes
Papillae Below: Never

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

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

Cortex K+ Yellow: Almost always
Medulla P+ Orange or Red: Sometimes
Medulla P+ Yellow: Rarely
Medulla K+ Orange or Red: Sometimes
Medulla K+ Yellow: Sometimes
Sexual Reproduction
Perithecia: Never
Apothecia: Rarely
   Mazaedium: Never
Disk Color    (Dry) 
   Disk Black: Almost always

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