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

Summary:
Features include minute brown cups with a blackish inside surface, absent or short stem, growth on large dead spots on living salal leaves, and microscopic characters. It is associated with the leaf spot caused by Pestalotia gibbosa Harkness which represents the conidial stage, (Seaver).

Pestalopezia brunneopruinosa is found from WA to northern CA (Seaver) and is common in western OR and WA (Zeller). There are collections from BC at the Pacific Forestry Centre and at the University of British Columbia.

Upper surface:
0.06-0.2cm across; closed at first then cup-shaped; spore-bearing upper surface fuscous black (due to brownish tips of paraphyses), (Zeller)

Underside:
fawn-color to wood brown; powdery villose, (Zeller)

Stem:
absent or short (Zeller)

Microscopic:
spores 14-20 x 7-10 microns, elliptic, colorless, containing 1 or 2 oil droplets, uniseriate; asci reaching a length of 120-140 microns and a width of 10-14 microns, clavate-cylindric, colorless; paraphyses 4-6 microns wide at tips, slender, clavate, light brown in upper part, forming an epithecium 130-160 microns thick; exterior with brown septate hyphae with swollen cells toward tip; medullary tissues a colorless pseudoparenchyma, thick; hypothecium thin, of interwoven hyphae, (Zeller)