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Summary Basidiocarps of Inonotus obliquus at the margin of a sterile conk were observed on the stem of a living paper birch tree (Betula papyrifera) in North America. The basidiocarps were small in size and similar in shape to basidiocarps formed on potato‐dextrose agar medium. This is the first report of basidiocarp formation on the stem of a healthy looking birch.
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Cha et al. (2010) studied this question.
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