Ascobolus stercorarius

Ascobolus stercorarius is a species of apothecial fungus belonging to the family Ascobolaceae. This is a European species appearing as yellowish discs, turning brown at maturity, up to 5 mm across on animal dung, especially cow, from spring to autumn. ...
Found on http://en.wikipedia.org/wiki/Ascobolus_stercorarius
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