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Lobaria oregana

Overview
PNW Range:
  West sideCommon
  East sideNone
  Immediate coastOccasional
  Alpine or subalpineNone
Habitat: Oceanic forests, reaching maximum dominance in mid-elevation old-growth forests (Pseudotsuga - Tsuga heterophylla) on the west slope of the Cascades. Occasional in moist low-elevation forests in the foothills.
Substrate: Usually on coniferous trees; sporadically on hardwoods including Alnus, Fraxinus, and shrubs.
Comments:
Synonymy: none
Lobaria oregana - Apothecia
Apothecia
by B. McCune
1/7
Lobaria oregana - Habit
Habit
by B. McCune
2/7
Lobaria oregana - Habit
Habit
by B. McCune
3/7
Lobaria oregana - Habit
Habit
by B. McCune
4/7
Lobaria oregana - Cephalodium section
Cephalodium section
by B. McCune
5/7
Lobaria oregana - Habit
Habit
by B. McCune
6/7
Lobaria oregana - Habit
Habit
by R. Droker
7/7
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Never
Foliose: Almost always
Crustose: Never
Appressed Foliose: Sometimes
Fluffy Foliose or Strappy: Commonly
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): 30 (± 10)

Upper Surface
Upper Surface Color    (Dry) 
   Pale Gray Green: Rarely
   Pale Yellow Green: Almost always
   Pale Green: Almost always
   Dark Green: Rarely
Upper Surface Tomentose: Never
Upper Surface Pruinose or Scabrid: Never
Upper Surface with Network of Ridges: Almost always
   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

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

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

Chemistry
Usnic Acid: Almost always
Cortex KC+ Yellow: Almost always
Medulla P+ Orange or Red: Almost always
Medulla P+ Yellow: Sometimes
Medulla 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: Never
Lobules: Almost always