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Lobaria hallii

PNW Range:
  West sideRare
  East sideRare
  Immediate coastRare
  Alpine or subalpineNone
Habitat: Riparian forests, usually where sheltered and moist.
Substrate: Bark and wood, both conifers and hardwoods, east Cascades mainly on Populus trichocarpa.
Synonymy: Lobaria silvae-veteris
Lobaria hallii - Habit
by B. McCune
Lobaria hallii - Upper surface
Upper surface
by B. McCune
Lobaria hallii - Lower
by B. McCune
Lobaria hallii - Upper hairs
Upper hairs
by B. McCune
Lobaria hallii - 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): 25 (± 10)

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

Cortex K+ Yellow: Almost always
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