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Umbilicaria americana  >
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Trentepohlia (alga) species

Overview
PNW Range:
  West sideCommon
  East sideUncommon
  Immediate coastCommon
  Alpine or subalpineRare
Habitat: Exposed to somewhat sheltered trees and rocks, mainly in suboceanic to oceanic climates.
Substrate: Usually on bark, both conifers and hardwoods, occasionally on rock.
Comments:
Synonymy: none
Trentepohlia (alga) species - Habit
Habit
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Trentepohlia (alga) species - Sporangia
Sporangia
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Trentepohlia (alga) species - Habit
Habit
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Trentepohlia (alga) species - Branches, microscopic view
Branches, microscopic view
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Trentepohlia (alga) species - Field habit
Field habit
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Trentepohlia (alga) species - Habit
Habit
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Scale: Bar=1mm unless noted
Growth Form
Fruticose: Commonly
Foliose: Never
Crustose: Never
Appressed Foliose: Never
Fluffy Foliose or Strappy: Never
Dangling Hair: Never
Erect Hair: Commonly
Appressed Hair: Never
Stalks With Squamules: Never
Stalks: Sometimes
Squamules: Never
Single Holdfast: Never
Dangling Nets: Never
Lobe Width (mm): 0 (± 0)

Upper Surface
Upper Surface Color    (Dry) 
   Orange: Commonly
   Yellow: Sometimes
   Brown: Rarely
   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) 
Veined Below: Never
Rhizinate Below: Never
   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: Almost always
Cyanobacteria Primary Photobiont: Never
Internal Cephalodia: Never
External Cephalodia: Never

Sexual Reproduction
Perithecia: Never
Apothecia: Never
   Mazaedium: Never
Disk Color    (Dry) 

Asexual Reproduction
Isidia: Never
Soredia: Never
Lobules: Never