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Eleven fruit bodies of Ganoderma sp. were collected from eight locations throughout the forest of Kangwon province and Kyunggi province in Korea. The hosts in forest were cut trunks of Quercus dentata, Q. variabilis, Prunes peria and Alnus japonica that was newly surveyed but 5 isolates were collected at the farms of Ganoderma mushroom. Most fruit bodies were formed solitarily on the cut trunks but GS-106 isolate grown in crowds on cut trunk of Alnus japonica. Optimal temperature ranges for isolates of species studied were : G. applanatum 28℃∼30℃, G. lucidum 28∼30℃, G. neo-japonicum 28℃, and G. tsuage 26℃ and all the species grew slowly at the 32℃. Hamada medium adjusted with pH 5.4 and 6.2 is better than other media for mycelial growth. Mycelial morphological characteristics of site species were studied: G. applanatum, G. lucidum and G. neo-japonicum produced typical type of staghorn hyphae but G. oregonens and G. valeosiacum produced staghorn hyphae with a branch of grape form. Clamp connection was observed on hypha of G. applanatum, G. lucidum, G. oregonense and G. valeosiacum except G. neo japonicum with node type. Chlamydospore was produced by G. applanatum, G. neo-japonicum. and cuticular cells were present on hyphae of G. lucidum, G. neo-japonicum, G. oregonense and G. tsugae.
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