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Cetraria orbata

PNW Range:
  West sideCommon
  East sideOccasional
  Immediate coastCommon
  Alpine or subalpineRare
Habitat: Mainly in low elevation moist forests, fairly shade tolerant but also in exposed microsites.
Substrate: On bark and wood, mainly conifers but also on hardwoods.
Synonymy: Tuckermannopsis orbata, Nephromopsis orbata
Cetraria orbata - Apothecia
by B. McCune
Cetraria orbata - Rhizines
by B. McCune
Cetraria orbata - Pycnidia
by B. McCune
Cetraria orbata - Habit
by B. McCune
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): 3 (± 1)

Upper Surface
Upper Surface Color    (Dry) 
   Dark Green: Rarely
   Olive Brown: Commonly
   Olive Green: Rarely
   Brown: Commonly
   Tan: Commonly
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: Sometimes
Lower Surface (Foliose)
Lower Surface Color    (Dry) 
   Whitish: Almost always
   Brown: Sometimes
   Tan: Almost always
Veined Below: Never
Rhizinate Below: Commonly
   Rhizines Squarrose: Never
Tomentose Below: Never
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: 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: Never
Soredia: Never
Lobules: Never