Склеротиниозная снежная плесень клевера

The fructifications arise from buried, irregular black sclerotium (8–18 mm). Apothecia 6–9 mm in diam., disc concave, light ocher brown to reddish brown, smooth and lighter than the receptacle, margin somewhat darker. Stipe 20–30 × 1–1.5 mm, cylindrical, tapering towards the base, concolorous with the outer surface of the disc. Ectal excipulum composed of globose cells. Asci 120–140 × 8–11 μm, cylindrical-clavate, 8-spored, uniseriate and arising from croziers. Paraphyses slightly clavate, septate, branched. Ascospores 10–17 × 7–9.5 μm, dimorphic in size, generally four smaller (10–12 × 7–7.5 μm) and the other four larger (13–17 × 7.5–9.5 μm), elliptical to amygdaliform, smooth, hyaline, with some big drops or several smaller.

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