Cetraria aculeata - Common Macrolichens of the Pacific Northwest

< Candelaria pacifica

Cetraria canadensis >

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Cetraria aculeata

Overview
PNW Range:
West side	Rare
East side	Uncommon
Immediate coast	None
Alpine or subalpine	Common
Habitat:	Montane to alpine rock outcrop areas and tundra.
Substrate:	Mosses, soil, and humus, often over rock.
Comments:
Synonymy:	Cornicularia aculeata

Cetraria aculeata - Habit

Habit
by B. McCune

1/2

Cetraria aculeata - Branches

Branches
by B. McCune

2/2

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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:	Almost always
Appressed Hair:	Never
Stalks With Squamules:	Never
Stalks:	Never
Squamules:	Never
Single Holdfast:	Never
Dangling Nets:	Never

Upper Surface
Upper Surface Color (Dry)
Olive Brown:	Rarely
Brown:	Commonly
Tan:	Commonly
Upper Surface Tomentose:	Never
Upper Surface Pruinose or Scabrid:	Never
Upper Surface with Network of Ridges:	Never
Upper Surface with Pseudocyphellae:	Almost always
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:	Never

Sexual Reproduction
Perithecia:	Never
Apothecia:	Rarely
Mazaedium:	Never
Disk Color (Dry)
Disk Brown or Tan:	Almost always

Asexual Reproduction
Isidia:	Never
Soredia:	Never
Lobules:	Never