The Hypogymnia Species of North America

Hypogymnia pulverata

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

Overview

Synopsis: Solid flattened lobes with soredia, the soredia formed initially on edges of flakes of cortex; P- or P+ orange red.
Distribution: Circumpacific, including S. America, Asia, and N. America. Japan, Russian Far East, Australia, N.Z. (Lai 1980); China (Jilin) as H. mundata f. sorediosa (Wei 1991). Argentina (Calvelo & Liberatore 2002). New Zealand: North Island (several localities); South Island: Nelson, Marlborough, Canterbury, Otago, Southland (Galloway 2007). Tasmania (Kantvilas et al. 2002).
Habitat: temperate forests
Range: Eastern North America, Arctic, Subarctic, Alpine, Pacific Northwest Immediate Coast
Other Diagnostics: Solid flattened lobes with soredia. Lobe tips rather pointed. Lower surface sometimes perforate near lobe tips. Soredia formed initially on edges of flakes of cortex. "...soredia ... become very dense and coarse... generally solid medulla and the tough, cartilaginous lobes. The marginal lobes are typically adnate, contiguous and overlapping, but loose, elongate, suberect lobes may also be developed from the central parts... most similar to H. subphysodes var. austerodioides, which has a hollow medullary cavity and more fragile lobes." (Kantvilas et al. 2002). Rare form has laminal granules or isidia (not bursting), e.g. Tibell 15043 (UPS). Kalb 19046 sp. meas. From photos: 6.2-7.6 x 4.6-5.1 median 6.8x4.8. Spermatia 5.1-6.2x0.8-1.1 meian 5.7x0.9
Substrate Notes: On logs, stumps, Eucalyptus (dead and alive), conifers, Tusga diversifolia (Japan), Picea sitchensis and other conifers (N Am)
Abundance in North America: Rare
Substrate: Typically
Host: Conifers, logs, Eucalyptus, Picea glehnii
On Rock: Rarely
On Moss/Detritus/Sod: Never
Authority: (Nyl. in Cromb.)Elix
References: Elix (1979), Brodo (1989), McCune et al. (1997), Kantvilas et al. (2002), Nelson et al. (2011)
Synonymy: Hypogymnia mundata var. pulverata
Hypogymnia pulverata - Habit
Habit

Vegetative Structures

Habit Appressed: Commonly
Habit Pendulous: Rarely
Habit Erect to Suberect: Sometimes
Size (cm): Mean: 10 SD: 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 or separate
Lobe Outline: Even to +/- nodulose
Upper Surface Texture: Becoming rugose
Branching: Variable
Budding: Absent or rare
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: Soft
Medulla: Almost always
Ceiling Color: White
Floor Color: White
Hypogymnia pulverata - Lobes
Lobes
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Hypogymnia pulverata - Habit
Habit
2/11
Hypogymnia pulverata - Habit
Habit
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Hypogymnia pulverata - Habit
Habit
4/11
Hypogymnia pulverata - Habit
Habit
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Hypogymnia pulverata - Lower surface
Lower surface
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Hypogymnia pulverata - Lobe cavity
Lobe cavity
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Hypogymnia pulverata - Lobes
Lobes
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Hypogymnia pulverata - Habit
Habit
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Hypogymnia pulverata - Habit
Habit
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Reproductive Structures

Soredia: 3 + 5
   Soredia Texture: Sometimes
   Soredia Terminal or Laminal: Sometimes
   Soredia Shape Lip-Shaped: Never
   Schizidia: Sometimes
   Isidia: None
Lobules: None
Apothecia: Rare
Spore Length (µm): Mean: 7 SD: 0.5 Max: 8 Min: 6
Spore Width (µm): Mean: 4.8 SD: 0.15 Max: 5.1 Min: 4.5
Pycnidia: Rare
Hypogymnia pulverata - Soredia
Soredia
1/6
Hypogymnia pulverata - Apothecia
Apothecia
2/6
Hypogymnia pulverata - Apothecia
Apothecia
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Hypogymnia pulverata - Soredia
Soredia
4/6
Hypogymnia pulverata - Apothecia
Apothecia
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Hypogymnia pulverata - Ascospores
Ascospores
6/6

Chemistry