Mushrooms collected from Deogyu mountain, Korea, in 2011, were identified as four classes, four orders, 13 families, 22 genera, and 33 species. In particular, agaricales was most abundant and comprised more than 70%. Their antioxidant activities were estimated using three different bioassay methods, the 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) radical scavenging assay, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay, and reducing power assay. As a result, the methanol extracts of Stereum ostrea, Laetiporus sulphureus var. miniatus, and Tyromyces sambuceus exhibited potent antioxidant activity in all bioassays tested.

One rare and interesting species collected from Gyeryong-san, Chungnam Province is described and illustrated in detail. The species "Tectella patellaris (Fr.) Murr." and genus "Tectella Earle" is a first record for Korean fungal flora. Specimens cited here have been deposited in the Herbarium Conservation Center of National Academy of Agricultural Sciences.

One rare and interesting species collected from Seorak-san, Inje-gun; Yeonyeop-san, Hongcheon-gun; Daeam-san, Yanggugun, Gangwon-do; Pocheon-gun, Gyeonggi-do; Songni-san, Boeun-gun; Joryeong-san, Goesan-gun, Chungcheongbuk-do and Sobaeksan, Yeongju-si, Gyeongsangbuk-do is described and illustrated in detail. The species "Protodaedalea hispida Imazeki" and genus "Protodaedalea Iamzeki" has not been previously recorded in Korean fungal flora. The specimens have been deposited in the Herbarium Conservation Center of the National Academy of Agricultural Sciences. KEYWORDS : Fungal flora, Genus Protodaedalea, Protodaedalea hispidaThe specimens HCCN7713A, HCCN1946A, HCCN6948A, HCCN18557A, HCCN1246A, HCCN1857A, HCCN5808A, HCCN16548A, HCCN21372A, and HCCN21386A were collected from Seorak-san, Inje-gun; Yeonyeop-san, Hongcheon-gun; Daeam-san, Yanggu-gun, Gangwon-do; Pocheon-gun, Gyeonggi-do; Songni-san, Boeun-gun; Joryeong-san, Goesan-gun, Chungcheongbuk-do, and Sobaeksan, Yeongju-si, Gyeongsangbuk-do, respectively, in the summer rainy season. Measurements were made of all structures by sampling. For examination of the microscopic features, the segments of dried basidiocarps were transferred in vials with 70% alcohol or distilled water until the cells swelled to near their original size and shape. Then, the gill sections or trama were each placed on a slide glass, stained with staining reagents, covered with a coverslip, and observed under a light microscope. The macro and microscopic features are described in detail and illustrated with their habits and habitats. In the species descriptions, the range of the sample size is given, and the extreme variations are enclosed in parenthesis (e.g., spores (5) 7~12 (14.5) × 3.2~4 (5.5) µm. In the following descriptions, color names given in quotations and color notations, e.g., 4A2~8F4, are from those of Kornerup and Wanscher [1].Protodaedalea Imazeki, in Rev. Mycol. Paris 20: 159 [2]