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Cladonia albonigra  >
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Cetrelia cetrarioides

PNW Range:
  West sideOccasional
  East sideNone
  Immediate coastRare
  Alpine or subalpineNone
Habitat: Moist riparian and valley bottom forests, especially older Alnus rubra stands over seepy or swampy ground.
Substrate: Bark, mainly on Alnus rubra and other hardwoods, rarely on mossy rock.
Synonymy: none
Cetrelia cetrarioides - Habit
by B. McCune
Cetrelia cetrarioides - Pseudocyphellae
by B. McCune
Cetrelia cetrarioides - Upper surface
Upper surface
by B. McCune
Cetrelia cetrarioides - UV light
UV light
by B. McCune
Cetrelia cetrarioides - Habit
by B. McCune
Cetrelia cetrarioides - KC test
KC test
by B. McCune
Cetrelia cetrarioides - Soredia
by B. McCune
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): 11 (± 2)

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

Cortex K+ Yellow: Almost always
Medulla KC+ Orange, Red, or Pink: Sometimes
Medulla UV+ Blue White: 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