When: 2008-01-24

Collection location: Edgewood Blue, Wells Gray region, British Columbia, Canada [Click for map]

Who: Jason Hollinger (jason)

Specimen available

Extremely abundant crust lichen on aspen in this region. They literally change the color of the forest: the aspen would not look nearly so white from a distance were it not for this powdery white lichen.

Black apothecia with brown epihymenium, and hyaline hymenium, hypothecium and subhymenium. Algae in either the exciple or in the amphithecium (in which case the exciple has essentially disappeared). Spores hyaline, septate, bent/bean-shaped, 8 per ascus.


Apothecial section, at 400×.
Somewhat immature, bean-shaped spores among IKI-stained asci, at 1000×.

Proposed Names

87% (1)
Used references: Brodo, Irwin. 2001. Lichens of North America.
Based on microscopic features: Bent, septate, hyaline spores; algae in apothecia.

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= Observer’s choice
= Current consensus


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