Stereocaulon sterile - Common Macrolichens of the Pacific Northwest

< Stereocaulon spathuliferum

Stereocaulon tomentosoides >

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Stereocaulon sterile

Overview
PNW Range:
West side	Occasional
East side	Rare
Immediate coast	Uncommon
Alpine or subalpine	Uncommon
Habitat:	Sunny to sheltered rock outcrops, talus, and lava flows; low to moderately high elevations.
Substrate:	Rock (noncalcareous).
Comments:
Synonymy:	none

Stereocaulon sterile - Habit

Habit
by B. McCune

1/4

Stereocaulon sterile - Branches

Branches
by B. McCune

2/4

Stereocaulon sterile - Phyllocladia

Phyllocladia
by B. McCune

3/4

Stereocaulon sterile - Old stalk

Old stalk
by B. McCune

4/4

❮ ❯

Scale: Bar=1mm unless noted

Growth Form
Fruticose:	Almost always
Foliose:	Never
Crustose:	Never
Appressed Foliose:	Never
Fluffy Foliose or Strappy:	Never
Dangling Hair:	Never
Erect Hair:	Never
Appressed Hair:	Never
Stalks With Squamules:	Never
Stalks:	Almost always
Squamules:	Never
Single Holdfast:	Sometimes
Dangling Nets:	Never

Upper Surface
Upper Surface Color (Dry)
Pale Green:	Sometimes
Whitish:	Almost always
Pale Gray:	Almost always
Upper Surface Tomentose:	Sometimes
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

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:	Almost always

Chemistry
Cortex K+ Yellow:	Almost always
Medulla UV+ Blue White:	Almost always

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