Chaenomeles sinensis, called as Chinese quince, belongs to the family Rosaceae and is widely distributed in Korea,
China, and Japan. A microorganism was isolated from part of a twig of C. sinensis that showed an abnormal appearance. The
microorganism was identified as the slime mold of the division Myxomycota, which was previously unrecorded
in Korea. The present study reports the morphological characteristics of the isolated fungus and a phylogenetic relationship based
on the β-tubulin gene sequences.