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Nostoc (cyanobacteria) species

Overview
PNW Range:
  West sideCommon
  East sideCommon
  Immediate coastCommon
  Alpine or subalpineUncommon
Habitat: Common in a variety of habitats including disturbed soil and gravel along roads, also in sagebrush steppe, rocks in streams, and wet rooftops.
Substrate: Soil, rock, and organic substrates.
Comments:
Synonymy: none
Nostoc (cyanobacteria) species - Microscopic view
Microscopic view
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Nostoc (cyanobacteria) species - Habit
Habit
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Nostoc (cyanobacteria) species - Habit
Habit
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Nostoc (cyanobacteria) species - Free living, microscopic view
Free living, microscopic view
by B. McCune
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Scale: Bar=1mm unless noted
Growth Form
Fruticose: Sometimes
Foliose: Commonly
Crustose: Sometimes
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): 6 (± 3)

Upper Surface
Upper Surface Color    (Dry) 
   Dark Gray: Sometimes
   Black: Sometimes
   Olive Black: Sometimes
   Olive Brown: Sometimes
   Olive Green: 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) 
   Dark Gray: Sometimes
   Black: Sometimes
   Olive Black: Sometimes
   Olive Brown: Sometimes
   Olive Green: Sometimes
   Brown: Sometimes
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: Almost always

Photobiont
Green Algae Primary Photobiont: Never
Cyanobacteria Primary Photobiont: Almost always
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