Dermatocarpon rivulorum - Common Macrolichens of the Pacific Northwest

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Enchylium tenax >

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Dermatocarpon rivulorum

Overview
PNW Range:
West side	Occasional
East side	Occasional
Immediate coast	None
Alpine or subalpine	Common
Habitat:	Montane to alpine streams and rivulets.
Substrate:	Rock, noncalcareous.
Comments:
Synonymy:	none

Dermatocarpon rivulorum - Habit

Habit
by B. McCune

1/4

Dermatocarpon rivulorum - Spores

Spores
by B. McCune

2/4

Dermatocarpon rivulorum - Lower

Lower
by B. McCune

3/4

Dermatocarpon rivulorum - Upper surface

Upper surface
by B. McCune

4/4

❮ ❯

Scale: Bar=1mm unless noted

Growth Form
Fruticose:	Never
Foliose:	Almost always
Crustose:	Never
Appressed Foliose:	Almost always
Fluffy Foliose or Strappy:	Never
Dangling Hair:	Never
Erect Hair:	Never
Appressed Hair:	Never
Stalks With Squamules:	Never
Stalks:	Never
Squamules:	Never
Single Holdfast:	Almost always
Dangling Nets:	Never
Lobe Width (mm):	7 (± 3)

Upper Surface
Upper Surface Color (Dry)
Pale Gray:	Almost always
Dark Gray:	Almost always
Black:	Sometimes
Brown:	Almost always
Upper Surface Tomentose:	Never
Upper Surface Pruinose or Scabrid:	Rarely
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)
Black:	Almost always
Brown:	Commonly
Veined Below:	Sometimes
Rhizinate Below:	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:	Almost always
Apothecia:	Never
Mazaedium:	Never
Disk Color (Dry)

Asexual Reproduction
Isidia:	Never
Soredia:	Never
Lobules:	Never