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Cladonia cornuta

PNW Range:
  West sideOccasional
  East sideCommon
  Immediate coastUncommon
  Alpine or subalpineUncommon
Habitat: Cool, moist, montane habitats, in both oceanic and continental areas but more frequent in the latter, especially frequent on cool, moist talus slopes and outcrop areas.
Substrate: Peaty soil, mosses, occasionally on rotten wood, most frequent on moss mats over rock.
Synonymy: none
Cladonia cornuta - Soredia
by B. McCune
Cladonia cornuta - Habit
by B. McCune
Cladonia cornuta - Soredia
by B. McCune
Cladonia cornuta - Soredia
by B. McCune
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Almost always
Foliose: Never
Crustose: Never
Appressed Foliose: Never
Fluffy Foliose or Strappy: Never
Dangling Hair: Never
Erect Hair: Never
Appressed Hair: Never
Stalks With Squamules: Almost always
Stalks: Almost always
Squamules: Sometimes
Single Holdfast: Never
Dangling Nets: Never

Upper Surface
Upper Surface Color    (Dry) 
   Pale Gray Green: Almost always
   Pale Green: Almost always
   Olive Brown: Sometimes
   Olive Green: Almost always
   Brown: Sometimes
   Tan: Rarely
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: Never
Lower Surface (Foliose)
Lower Surface Color    (Dry) 
   Whitish: Almost always
   Pale Gray: Sometimes
Veined Below: Never

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

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

Medulla P+ Orange or Red: 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

Cladonia Specific
Cup forming: Rarely
Richly Branched: Never
Stalks With Melanotic Base: Never
Branch Axils Or Cups Open: Never