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Peltigera hydrothyria

PNW Range:
  West sideRare
  East sideRare
  Immediate coastNone
  Alpine or subalpineNone
Habitat: Aquatic, in mountain streams and springs, especially those without marked seasonal fluctuations.
Substrate: Rocks and gravel, rarely wood.
Comments: Includes P. hydrophyria var. aquatica and P. hydrothyria var. gowardii in the PNW.
Synonymy: none
Peltigera hydrothyria - Habit
by B. McCune
Peltigera hydrothyria - Lower
by B. McCune
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Never
Foliose: Almost always
Crustose: Never
Appressed Foliose: Sometimes
Fluffy Foliose or Strappy: Sometimes
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): 10 (± 5)

Upper Surface
Upper Surface Color    (Dry) 
   Pale Gray: Sometimes
   Dark Gray: Almost always
   Black: Sometimes
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) 
   Pale Gray: Almost always
   Dark Gray: Almost always
   Black: Sometimes
Veined Below: Almost always
Rhizinate Below: Almost always
   Rhizines Squarrose: Never
Tomentose Below: Sometimes
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: Never
Soredia: Never
Lobules: Never