The Hypogymnia Species of North America

Hypogymnia austerodes

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

Overview

Synopsis: Rosettiform, solarizing to brown, with laminal granular to isidiose soredia; medulla K+ slow red brown or K-, KC+ orange, P-.
Distribution: Widespread in northern hemisphere, tundra to boreal and montane. Helvetia, Schleicher 279a, China (Wei 1991), Morocco (Egea 1996), Svalbard (Elvebakk & Hertel 1996 -- and see H. subobscura); Xizang (Tibet) (Wei & Jiang (1986). Kazakhstan (Wagner & Spribille 2005, unpublished list).
Habitat: cool temperate to arctic-alpine
Range: Southern Rocky Mountains, Northern Rocky Mountains, Arctic, Subarctic, Alpine
Abundance in North America: Common
Substrate: Typically
Host: Conifers
On Rock: Rarely
On Moss/Detritus/Sod: Rarely
Authority: (Nyl.) Ras.
References: Hansen & McCune (2010), Westberg et al. (2011)
Synonymy: Hypogymnia dichroma,
Hypogymnia austerodes - Habit
Habit

Vegetative Structures

Habit Appressed: Almost always
Habit Pendulous: Never
Habit Erect to Suberect: Never
Size (cm): Mean: 10 SD: 5
Upper Color- White to Greenish Gray: Greenish gray to brown
Upper Surface Brown when Solarized: Dark brown
Dark Mottles: Often present
Black Border: Sometimes present
Lobes Separated: Contiguous
Lobe Outline: Pinched and swollen
Upper Surface Texture: Smooth to rugose
Branching: Variable
Budding: Present
Lobe Width (mm): Mean: 1.25 SD: 0.375
Lobe Tips, Axils, and/or Lower Surface Perforated: Rarely
Lobe Tips Perforated: Rarely perforate
Lower Surface Perforated: Entire
Cavernulae: Never
Thallus Texture: Cartilaginous
Medulla: Almost always
Ceiling Color: White
Floor Color: Dark to grayish
Hypogymnia austerodes - Habit
Habit
1/6
Hypogymnia austerodes - Lobe cavity
Lobe cavity
2/6
Hypogymnia austerodes - Lobes
Lobes
3/6
Hypogymnia austerodes - Lobes
Lobes
4/6
Hypogymnia austerodes - Lobes
Lobes
5/6

Reproductive Structures

Soredia: 4+5
   Soredia Texture: Sometimes
   Soredia Terminal or Laminal: Rarely
   Soredia Shape Lip-Shaped: Never
   Schizidia: Sometimes
   Isidia: Rare
Lobules: Often present
Apothecia: Rare
Spore Length (µm): Mean: 6.4 SD: 0.45 Max: 7.3 Min: 5.5
Spore Width (µm): Mean: 5.05 SD: 0.075 Max: 5.2 Min: 4.9
Pycnidia: Occasional
Hypogymnia austerodes - Soredia
Soredia
1/7
Hypogymnia austerodes - Apothecia
Apothecia
2/7
Hypogymnia austerodes - Soredia
Soredia
3/7
Hypogymnia austerodes - Soredia
Soredia
4/7
Hypogymnia austerodes - Spermatia
Spermatia
5/7
Hypogymnia austerodes - Ascospores
Ascospores
6/7
Hypogymnia austerodes - Soredia
Soredia
7/7

Chemistry