Ninety–four fossil woods were collected from the Upper Triassic Jogyeri Formation of the Nampo Group in the County of Cheongyang-gun, Chungcheongnam- do Province, Korea. Eight of the specimens were preserved well enough to identify them down to species or genus. All were coniferous woods. On the basis of their detailed anatomical features, four specimens were identified as Xenoxylon phyllocladoides Gothan and the other four as Agathoxylon sp. Therefore six taxa of fossil woods, Cedroxylon regulare Göppert, Xenoxylon phyllocladoides Gothan, X. latiporosum (Cramer) Gothan, X. japonicum Vogellehner, Phyllocladoxylon heizyoense Shimakura and Agathoxylon sp., have now been reported from the Early Mesozoic Daedong Supergroup in the Korean Peninsula.
Eighty-two silicified fossil woods were collected from Miocene formations on the western coast of the Yamagata Prefecture, Japan. Twenty-two taxa (5 conifers and 17 dicotyledons) were identified. Five new species (Chamaecyparis parathyoides, Pterocarya parvipora, Populus soyaensis, Schima protowallichii, Lagerstroemia odaniense) and two species not previously known from the Miocene of Yamagata are described. This brings the number of fossil wood taxa from the Miocene of Yamagata to 39. Warm temperate elements such as Keteleeria, Liquidambar, Distylium and Lagerstroemia were found in the formations studied. The fossil wood assemblages from four Miocene formations (except Onisakatoge Formation from which only one sample was collected) suggest that the woody flora changed gradually during the Miocene from a mixture of cool and warm temperate elements to a warm temperate assemblage. These changes agree well with the vegetation changes during the Miocene in Japan; from the Aniai type to the Daijima-type.