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Cetraria pallidula

Overview
PNW Range:
  West sideRare
  East sideRare
  Immediate coastNone
  Alpine or subalpineNone
Habitat: On well-lit branches beneath an open canopy or on branches in the upper crown; mesic forests at low to mid elevations.
Substrate: On bark and wood of conifers, especially on Larix and Pinus contorta.
Comments:
Synonymy: Ahtiana pallidula, Tuckermannopsis pallidula
Cetraria pallidula - Lower
Lower
by B. McCune
1/3
Cetraria pallidula - Habit
Habit
by B. McCune
2/3
Cetraria pallidula - Apothecia
Apothecia
by B. McCune
3/3
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Never
Foliose: Almost always
Crustose: Never
Appressed Foliose: Rarely
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): 6 (± 2)

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

Chemistry
Usnic Acid: Almost always
Cortex KC+ Yellow: Almost always
Sexual Reproduction
Perithecia: Never
Apothecia: Sometimes
   Mazaedium: Never
Disk Color    (Dry) 
   Disk Brown or Tan: Almost always

Asexual Reproduction
Isidia: Never
Soredia: Never
Lobules: Never