Xanthoria parietina - Common Macrolichens of the Pacific Northwest

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Xanthoria parietina

Overview
PNW Range:
West side	Common
East side	Uncommon
Immediate coast	Occasional
Alpine or subalpine	None
Habitat:	Hardwood forests in low-elevation broad valleys; scattered on Populus and other hardwoods in riparian areas in agricultural and populated areas.
Substrate:	Bark and wood, rarely on rock (e.g. gravestones), roofing, and fiberglass.
Comments:
Synonymy:	none

Xanthoria parietina - Habit

Habit
by B. McCune

1/3

Xanthoria parietina - Apothecia

Apothecia
by B. McCune

2/3

Xanthoria parietina - Lobes

Lobes
by B. McCune

3/3

❮ ❯

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:	Never
Dangling Nets:	Never
Lobe Width (mm):	2.6 (± 1.3)

Upper Surface
Upper Surface Color (Dry)
Pale Green:	Rarely
Dark Green:	Rarely
Orange:	Almost always
Yellow:	Almost always
Upper Surface Tomentose:	Never
Upper Surface Pruinose or Scabrid:	Never
Upper Surface with Network of Ridges:	Rarely
Upper Surface with Pseudocyphellae:	Never
Upper Surface with Holes into Cavity:	Never
Cilia on Margins:	Never

Lower Surface (Foliose)
Lower Surface Color (Dry)
Orange:	Almost always
Yellow:	Almost always
Whitish:	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+ Purple or Red:	Almost always

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

Asexual Reproduction
Isidia:	Never
Soredia:	Never
Lobules:	Never