Summary:
Features include tiny disc-shaped fruitbodies on hemlock, the underside grayish brown and pruinose, the spore-bearing upper surface dark brown, and the stem short or almost absent. Microscopic characters include 4-spored asci.
Pestalopezia tsugae was described from BC.
Upper surface:
0.06-0.15cm across, at first spherical "then expanding to broad, round discs, pruinose, greyish brown with dark brown hymenium, marginate"
Underside:
grayish brown; pruinose
Stem:
subsessile to short-stemmed
Microscopic:
spores 20-24 x 10-14 microns from 4-spored asci, 30 x 10 microns from 2-spored asci, elliptic, dark brown with brittle epispore, with one or two droplets, not septate; asci 4-spored, occasionally 2-spored, 110 x 15 microns, cylindric, pore not staining in iodine; paraphyses filiform, colorless, simple, greatly inflated at tip with brown spherical cells 6-10 microns in diameter, forming a dark brown epithecium; narrow hypothecium of yellowish textura intricata, medullary excipulum of white textura globulosa, ectal excipulum of light brown texture globulosa
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