Shizukari Mire is situated along the south-western Pacific coast of Hokkaido. Once it had a beautiful and excellent landscape due to various community types and high species diversity with many ponds and floating-islands. It was designated as a national natural monument in 1922. But this status was cancelled in 1951. Analysis of old topographical maps and documents revealed that, the reason for the cancellation was not the devastation of the mire but the pressure to develop agricultural lands. The size of the mire was 263 ha in 1917. In 1953, two years after the cancellation, it became 221 ha. Then the mire was converted rapidly into agricultural land and by 1996 it was reduced to only 34 ha. The remaining mire is the center part of the former bog and includes some pond vegetation. Two substitutional community types are recorded at the hollow, the Rhynchospora alba - Drosera rotundifolia community and the Rhynchospora fauriei - Rhynchospora alba community. Most of the remaining mire had been covered with lawn vegetation which has changed into substitutional vegetation, the Rhus trichocarpa - Moliniopsis japonica community by drainage and theft. The conservation and rehabilitation of the mire are needed immediately because the succession is continuing and the remaining mire is in very dangerous condition.
Imperata cylindrica type grassland on embankment slopes, levee slopes and reclaimed land etc. was studied phytosociologically. The results show that this grassland was recognized as a new association (Erigeronto-Imperatetum cylindricae) characterized by the presence of Erigeron annuus, Rumex acetosa, Solidago altissima etc. and the absence of many character and differential species of Miscanthetea sinensis, Haloragis micrantha, Gentiana scabra var. buergeri, Potentilla freyniana etc. Its geographical distribution in Japan was from Tohoku to Kyushu district. Semi-natural grasslands in Japan are represented by two typical grasslands ; one is mowing grassland dominated by Miscanthus sinensis, the other is grazing grassland dominated by Zoysia japonica. This association is a new type of grassland (weeding grassland dominated by Imperata cylindrica) maintained by two or three weedings per year. The distinguishing factors which differentiate this association from Miscanthus-Zoysia type associations occur in the life-form spectrum, the phytosociological spectrum and naturalized plants ratio, as well as the floristic composition. The association was divided into two seasonal lower units, spring aspect and autumn aspect, and belongs to Miscanthetea sinensis, Caricetalia nervatae and Zoysion japonicae. Furthermore, Erigeronto-Imperaterum cylindricae on levee slopes in Sanda, Hyogo Pref. was divided into two lower units : one is Adenophora triphylla var. japonica lower unit characterized by the presence of Adenophora triphylla var. japonica, Cirsium japonicum, Sanguisorba officinalis etc. ; the other is typical lower unit characterized by the absence of these species. The former unit is distributed on levee slopes with no consolidation and the latter unit is on levee slopes with consolidation.
Marsh vegetation in the Mino-Mikawa region of Aichi pref., the western part of Shizuoka pref. and the southeastern part of Gifu pref. was examined by Braun-Blanquet's phytosociological method, and compared with similar associations reported from the western parts of Japan. Marsh vegetation in this region is characterized by genus Utricularia, Eriocaulon, and Rhynchospora, and the differentiation of communities is influenced mainly by topographical and stratigraphical features and formative processes of marshes. The vegetation was divided into six communities : 1. Eriocauletum nudicuspis ; 2. Rhynchosporetum chinensis ; 3. Eriocaulon mikawanum community ; 4. Eriocaulon buergerianum community ; 5. Sclerietum rugosae, ass. nov. ; 6. Metanarthecium luteo-viride - Moliniopsis japonica community. These communities are included in the alliance Eriocaulo-Rhynchosporion fujitani. The Sclerietum rugosae was described as a new association in this study. It is characterized by Scleria rugosa var. glabrescens, Scleria rugosa var. rugosa, Drosera spathulata, and Lycopodium cernuum, and is distributed in the Mino-Mikawa region and in low elevations from Kinki to Chugoku district.
A botanical survey aimed at compiling a checklist of the common plants from the site, and its surrounding, of the Kenya and Japan Social Forestry Training Project, Kitui, Kenya, was conducted in 1989 and 1990. The purpose of the checklist was to provide basic information for an ecological study of the area. A checklist of plants arranged alphabetically by scientific names and with their local Kamba names is presented. In addition, a separate list of local names arranged alphabetically is also included to facilitate cross-reference.