The Hypogymnia Species of North America

Hypogymnia farinacea

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


Synopsis: Laminal soredia forming along the edges of cortical flakes (schizidia), appressed often rosettiform thallus with contiguous to slightly separate lobes, not solarizing to brown, medulla K+ slow reddish brown, KC+ orange red.
Distribution: H: Norway, Sweden, Finland, Latvia, Estonia, France, c Europe. China (Wei 1991). Russia: European part of Russia, Altai (Rass. 1971). Turkey (John 1996). Ukraine (Kondratyuk et al. 1996). Rare and vulnerable species in southern Russian Far East, Primorsky and Sakhalin (Chabanenko 1995). Kazakhstan (Wagner & Spribille 2005, unpublished list).
Habitat: temperate to boreal conifer or mixed forest
Range: Southern Rocky Mountains, Northern Rocky Mountains
Other Diagnostics: Close-set appressed lobes, pale color, type 3 soralia, imperforate.
Substrate Notes: On tree trunks and branches, bark and wood, rarely on rocks; most common in northern Europe and Scandinavia on Pinus sylvestris bark, but also found on Alnus, Betula, Juniperus, Fagus, Picea, and bare wood, including fenceposts.
Abundance in North America: Present
Substrate: Typically
Host: Mainly conifers, occasionaly hardwoods
On Rock: Occasional
On Moss/Detritus/Sod: Never
Authority: Zopf
References: Bitter (1901), Westberg et al. (2011)
Synonymy: None
Hypogymnia farinacea - Habit

Vegetative Structures

Habit Appressed: Almost always
Habit Pendulous: Never
Habit Erect to Suberect: Never
Size (cm): Mean: 7 SD: 3.5
Upper Color- White to Greenish Gray: White to greenish gray
Upper Surface Brown when Solarized: Blackish or unknown
Dark Mottles: None or rare
Black Border: Not visible
Lobes Separated: Contiguous to +/- separate
Lobe Outline: Even to nodulose
Upper Surface Texture: Becoming rugose
Branching: Variable
Budding: Present
Lobe Width (mm): Mean: 1.75 SD: 0.625
Lobe Tips, Axils, and/or Lower Surface Perforated: Never
Lobe Tips Perforated: Entire
Lower Surface Perforated: Entire
Cavernulae: Never
Thallus Texture: Cartilaginous
Medulla: Almost always
Ceiling Color: White
Floor Color: Grayish
Hypogymnia farinacea - Lobe cavity
Lobe cavity
Hypogymnia farinacea - Lobes
Hypogymnia farinacea - Habit
Hypogymnia farinacea - Habit

Reproductive Structures

Soredia: Type 3
   Soredia Texture: Sometimes
   Soredia Terminal or Laminal: Rarely
   Soredia Shape Lip-Shaped: Never
   Schizidia: Almost always
   Isidia: None
Lobules: None
Apothecia: Rare
Spore Length (µm): Mean: 5.5 SD: 0.25 Max: 6 Min: 5
Spore Width (µm): Mean: 4.5 SD: 0.25 Max: 5 Min: 4
Pycnidia: Rare
Hypogymnia farinacea - Soredia
Hypogymnia farinacea - Soredia