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Cetraria platyphylla

Overview
PNW Range:
  West sideCommon
  East sideAbundant
  Immediate coastRare
  Alpine or subalpineCommon
Habitat: In the crowns of trees in low elevation moist forests, drier inland forests, and open-grown trees to timberline.
Substrate: Bark and wood, mainly conifers.
Comments:
Synonymy: Tuckermannopsis platyphylla, Nephromopsis orbata
Cetraria platyphylla - Pycnidia
Pycnidia
by B. McCune
1/3
Cetraria platyphylla - Lower
Lower
by B. McCune
2/3
Cetraria platyphylla - Lobes
Lobes
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): 7.5 (± 2.25)

Upper Surface
Upper Surface Color    (Dry) 
   Dark Green: Rarely
   Olive Brown: Sometimes
   Olive Green: Rarely
   Brown: Almost always
   Tan: 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) 
   Brown: Almost always
   Tan: Commonly
Veined Below: Never
Rhizinate Below: Rarely
   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

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

Asexual Reproduction
Isidia: Sometimes
Soredia: Never
Lobules: Rarely