Hypogymnia imshaugii - Common Macrolichens of the Pacific Northwest

Click on Characteristic name for explanation. Click on image for larger version.

Hypogymnia imshaugii

Overview
PNW Range:
West side	Occasional
East side	Abundant
Immediate coast	None
Alpine or subalpine	Occasional
Habitat:	Low elevation to subalpine forests and savannas, occasionally in steppe (on fences and shrubs); in moist, dense forests mostly restricted to the upper canopy.
Substrate:	Bark and wood.
Comments:
Synonymy:	none

Hymenium, polarized light
by B. McCune

1/18

Lower surface
by B. McCune

2/18

Habit
by B. McCune

3/18

Habit
by B. McCune

4/18

Habit
by B. McCune

5/18

Habit
by B. McCune

6/18

Habit
by B. McCune

7/18

Habit
by B. McCune

8/18

Habit
by B. McCune

9/18

Lobe cavity
by B. McCune

10/18

Spermatia
by B. McCune

11/18

Lobe cavity
by B. McCune

12/18

Habit
by B. McCune

13/18

Ascospores
by B. McCune

14/18

Habit
by B. McCune

15/18

Hymenium
by B. McCune

16/18

Habit
by B. McCune

17/18

Habit
by B. McCune

18/18

❮ ❯

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):	1.15 (± 0.425)

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

Lower Surface (Foliose)
Lower Surface Color (Dry)
Black:	Almost always
Veined Below:	Never
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:	Almost always
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
Medulla P+ Orange or Red:	Commonly
Medulla KC+ Orange, Red, or Pink:	Commonly
Medulla UV+ Blue White:	Sometimes

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

Asexual Reproduction
Isidia:	Never
Soredia:	Never
Lobules:	Never