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Letharia columbiana  >
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Leptogium saturninum

Overview
PNW Range:
  West sideOccasional
  East sideOccasional
  Immediate coastOccasional
  Alpine or subalpineNone
Habitat: Most frequent in moist riparian forests at low elevations.
Substrate: Usually on bark, most commonly deciduous trees and shrubs, occasionally on rock or moss over rock.
Comments:
Synonymy: none
Leptogium saturninum - Lower
Lower
by B. McCune
1/3
Leptogium saturninum - Isidia
Isidia
by B. McCune
2/3
Leptogium saturninum - Habit
Habit
by B. McCune
3/3
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Never
Foliose: Almost always
Crustose: Never
Appressed Foliose: Almost always
Fluffy Foliose or Strappy: Rarely
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): 6 (± 2)

Upper Surface
Upper Surface Color    (Dry) 
   Dark Gray: Almost always
   Black: Almost always
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) 
   Dark Gray: Almost always
   Black: Almost always
   Brown: Almost always
Veined Below: Never
Rhizinate Below: Never
Tomentose Below: Almost always
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: Almost always

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

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

Asexual Reproduction
Isidia: Commonly
Soredia: Never
Lobules: Never