Spermogonia and aecia were found on Persicaria odorata subsp. conspicua (Polygonaceae) in a reed field of Lake Kasumigaura, Ibaraki, Japan. Near these plants, telia appeared to be Puccinia trabutii var. abei, of which the other spore stages were unknown, were found on culms of Phragmites australis. Inoculation experiments using basidiospores and aeciospores demonstrated that the two rust fungi were conspecific and the species was a heteroecious macrocyclic species of Puccinia. In addition to telia, an uredinial stage of the rust species was found on Ph. australis in the field observation and the inoculation experiments with aeciospores. Based on morphological observation including type specimens, the rust species was identified as P. abei. Characteristics of all the spore stages were described.
Yamaoka et al. (Thu,) studied this question.
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