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Nephroma occultum

Overview
PNW Range:
  West sideRare
  East sideNone
  Immediate coastNone
  Alpine or subalpineNone
Habitat: Almost all known locations are from old-growth forests on the west slope of the Cascades, dominated by Pseudotsuga - Tsuga heterophylla, stands tending to have abundant populations of Lobaria oregana; on fallen branches or recently windthrown trees; near the forest floor only where the forest is somewhat more open; most frequent in the mid to upper canopy.
Substrate: Bark and wood of conifers.
Comments:
Synonymy: none
Nephroma occultum - Soredia
Soredia
by B. McCune
1/6
Nephroma occultum - Lower
Lower
by B. McCune
2/6
Nephroma occultum - Habit
Habit
by B. McCune
3/6
Nephroma occultum - Habit
Habit
by B. McCune
4/6
Nephroma occultum - Soredia
Soredia
by B. McCune
5/6
Nephroma occultum - Habit
Habit
by B. McCune
6/6
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): 7 (± 3)

Upper Surface
Upper Surface Color    (Dry) 
   Pale Gray Green: Almost always
   Pale Yellow Green: Almost always
   Pale Green: Almost always
   Tan: Rarely
Upper Surface Tomentose: Never
Upper Surface Pruinose or Scabrid: Never
Upper Surface with Network of Ridges: Sometimes
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
   Brown: Almost always
   Tan: Almost always
Veined Below: Never
Rhizinate Below: Rarely
   Rhizines Squarrose: Never
Tomentose Below: Never
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: Never

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: Never
Soredia: Commonly
Lobules: Never