Physcia tenella - Common Macrolichens of the Pacific Northwest

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Physconia americana >

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Physcia tenella

Overview
PNW Range:
West side	Common
East side	Occasional
Immediate coast	Common
Alpine or subalpine	Uncommon
Habitat:	Occasional at low to mid elevations, most often on hardwoods and shrubs in open to semi-open habitats.
Substrate:	Bark or wood, occasionally on rock.
Comments:
Synonymy:	none

Physcia tenella - Habit

Habit
by B. McCune

1/5

Physcia tenella - Habit

Habit
by R. Droker

2/5

Physcia tenella - Habit

Habit
by B. McCune

3/5

Physcia tenella - Lower

Lower
by B. McCune

4/5

Physcia tenella - Habit

Habit
by B. McCune

5/5

❮ ❯

Scale: Bar=1mm unless noted

Growth Form
Fruticose:	Never
Foliose:	Almost always
Crustose:	Never
Appressed Foliose:	Sometimes
Fluffy Foliose or Strappy:	Commonly
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):	0.3 (± 0.1)

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

Lower Surface (Foliose)
Lower Surface Color (Dry)
Whitish:	Almost always
Tan:	Almost always
Veined Below:	Never
Rhizinate Below:	Almost always
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:	Never

Photobiont
Green Algae Primary Photobiont:	Almost always
Cyanobacteria Primary Photobiont:	Never
Internal Cephalodia:	Never
External Cephalodia:	Never

Chemistry
Cortex K+ Yellow:	Almost always

Sexual Reproduction
Perithecia:	Never
Apothecia:	Rarely
Mazaedium:	Never
Disk Color (Dry)
Disk Black:	Almost always

Asexual Reproduction
Isidia:	Never
Soredia:	Almost always
Lobules:	Never