Summary:
Features include small, yellow fruitbodies that are scurfy on the exterior, short or inconspicuous stem, growth on dung, and microscopic characters including spores that become violet to brownish, ornamented by longitudinal lighter lines.
Ascobolus michaudii is found at least in BC (Larsen). Collections were examined from ON, Czechoslovakia, France, Netherlands, and Poland, (Brummelen).
Upper surface:
0.07-0.25cm across, 0.08-0.2cm high, at first closed, spherical, barrel-shaped or cylindric, then opening and expanding, finally more or less obconic or with short stem, disc concave or flat, finally slightly convex; yellow or greenish yellow, dotted with the purplish black protruding tips of asci; margin dentate or mealy, finally almost smooth, (Brummelen)
Underside:
yellow or lemon-yellow; "covered with very small whitish grains, mealy or scurfy, rarely almost smooth", (Brummelen)
Stem:
"substipitate or with a short stalk"
Microscopic:
spores 17-22 x 9.5-12 microns, elliptic, "ornamented with more or less longitudinal or oblique, rather widely spread, rarely anastomosing lines", with unilateral mucilaginous substance, at first colorless then pale or dark violet, finally sometimes brownish, uniseriate at first, finally biseriate; asci 8-spored, 180-280 x 22-26 microns, clavate-cylindric, gradually narrowing downwards, rounded at top, walls amyloid; paraphyses 2.2-3.5(7) microns wide, cylindric or clavate, "enlarged, narrowed or forked above, at the apex 1.5-12 microns thick", simple or branched, septate, colorless, embedded in abundant greenish-yellow mucus, (Brummelen)
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