When: 2008-03-19

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

Who: Jason Hollinger (jason)

Specimen available

Crust lichen, on conifer twig.
THALLUS: intensely verrucose, surface of verrucae rough, whitish
MEDULLA: white
ALGAE: green
APOTHECIA: buried in verrucae
SPORES: 1 per ascus, 2 cells, thick walled, very finely roughened/textured, up to 180 µm long, walls to 12 µm (and apparently more)

Those spores are unmistakable.


Thallus at 10×.
Apothecial section, in water, at 100×.
Ascus and exciple in water, at 400×.
Spore in water, at 400×.

Proposed Names

87% (1)
Used references: Curtis Bjork
Based on microscopic features: Huge, thick-walled, 2-celled spores.

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= Observer’s choice
= Current consensus


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