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Scytinium californicum

PNW Range:
  West sideCommon
  East sideCommon
  Immediate coastCommon
  Alpine or subalpineOccasional
Habitat: Most commonly seen in outcrop and talus areas at low to mid elevations, where it is often intermixed in moss cushions over rock; in both open and sheltered sites.
Substrate: Moss or soil over rock, occasionally on tree trunks in moist climates at low elevations (especially west Cascades).
Comments: Includes most records of Scytinium lichenoides and Scytinium gelatinosum from the PNW.
Synonymy: Leptogium californicum
Scytinium californicum - Habit
by B. McCune
Scytinium californicum - Habit
by B. McCune
Scytinium californicum - Thallus section
Thallus section
by B. McCune
Scytinium californicum - Isidia
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): 2 (± 1)

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

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

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

Asexual Reproduction
Isidia: Sometimes
Soredia: Never
Lobules: Commonly