E-Flora BC: Electronic Atlas of the Flora of British Columbia

Summary:
Features include tiny discs that are dark brown and pruinose with a yellow spore-bearing upper surface, occasionally with smaller fruitbodies arising from within the primary one; rudimentary stem; growth on branches of Western Hemlock, and microscopic characters. The description is derived from Funk(6).

The type is from BC.

Upper surface:
0.05-0.15cm across, at first nearly spherical, expanding to broad disc, "regular or sometimes broadly undulate and proliferating smaller apothecia within" (the large undulating discs are formed as though closely situated fruitbodies had fused into one); spore-bearing surface yellow; margin broadly inrolled

Underside:
dark brown; pruinose

Stem:
subsessile [with rudimentary stem]

Microscopic:
spores 7-10 x 2-3 microns, elliptic to cuneate, colorless, not septate; asci 8-spored, 45-55 x 6-8 microns, cylindric, "a rectangular plug at the apex staining blue in iodine"; paraphyses broadly filiform or cylindric, colorless, simple, not forming an epithecium; medullary excipulum of colorless plectenchyma, "ectal excipulum of dark brown, moniliform cells arranged perpendicular to surface"