Common Macrolichens of the PNW
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Usnea longissima
Usnea rubicunda
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Click on Characteristic name for explanation. Click on image for larger version.
Usnea pacificana
Overview
PNW Range:
West side
Occasional
East side
Rare
Immediate coast
Occasional
Alpine or subalpine
None
Habitat:
Oceanic forests, woodlands, and shrublands.
Substrate:
On both hardwoods and conifers.
Comments:
Synonymy:
none
Papillae
by B. McCune
1/9
Isidia
by B. McCune
2/9
Base
by B. McCune
3/9
Habit
by B. McCune
4/9
Branches
by B. McCune
5/9
Branches
by B. McCune
6/9
Branches
by B. McCune
7/9
Branches
by B. McCune
8/9
Longitudinal section
by B. McCune
9/9
❮
❯
Scale: Bar=1mm unless noted
Growth Form
Fruticose
:
Almost always
Foliose
:
Never
Crustose
:
Never
Appressed Foliose
:
Never
Fluffy Foliose or Strappy
:
Never
Dangling Hair
:
Sometimes
Erect Hair
:
Commonly
Appressed Hair
:
Never
Stalks With Squamules
:
Never
Stalks
:
Never
Squamules
:
Never
Single Holdfast
:
Almost always
Dangling Nets
:
Never
Upper Surface
Upper Surface Color
(Dry)
Pale Yellow Green
:
Almost always
Pale Green
:
Almost always
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
:
Never
Interior
Inside (Medulla) Yellow or Orange
:
Never
Central Cord
:
Almost always
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
Usnic Acid
:
Almost always
Cortex KC+ Yellow
:
Almost always
Medulla P+ Yellow
:
Almost always
Medulla UV+ Blue White
:
Almost always
Sexual Reproduction
Perithecia
:
Never
Apothecia
:
Rarely
Mazaedium
:
Never
Disk Color
(Dry)
Disk Pale Greenish
:
Almost always
Disk Brown or Tan
:
Almost always
Asexual Reproduction
Isidia
:
Sometimes
Soredia
:
Sometimes
Lobules
:
Never
Usnea Specific
Papillae
:
Almost always
Branches Cigar Shaped
:
Never
Central Axis Pale Yellow
:
Never
Cortex Reddish in Part
:
Never
Central Axis Thick
:
Never
Main Branches Nearly Unbranched
:
Never
Branch Surface Wrinkled
:
Never
Fibrils Abundant
:
Almost always