In August 1956, June 1957 and October of the same year, the author visited the limestone range of Shimohei-gun, Pref Iwata, Japan, situated 100 m-800 m above the sea level and about 15 km far from the sea. There are cliff, escarpments and gravelly slopes consisted of the permo-carboniferous limestone. The study of the flora of this area has been neglected. This paper contains the results of his field observations and his herbarium works of the interesting vascular plants growing there, together with nomenclatural corrections and revisions of the related species. These are as follows : (1) The abundant plants are Acer mono, Quercus dentata, Tilia Maximowicziana, Lespedeza biclolor, L. Buergeri, Spiraea nipponica, galium verum var. trachycarpum, Gymnocarpium jessoense, Thalictrum foetidum subsp. Glabrescens var. Iwatensis. (2) The calciphilous plants detected are Amesium ruta-muraria, Bupleurum longiradiatum f. elatius, Camptosorus sibiricus, Cynanchum atratum, Dennstaedtia Wilfordii, Gymnocarpium jessoense, Philadelphus satsumi (with var. nikoensis), Polystichum craspedosorum, Rhamnus costata (f. nambuana9, Sisymbrium luteum, Smilax stans and Spiraea nipponica. (3) The new informations of the distributions are given for Aleuritopteris argentea, Allium splendens, Artemisia Schmidtiana, Astragalus adsurgens, A. membranaceus, Chrysanthemum Zawadskii, Gymnocarpium jessoense, Juniperus rigida, Sanicula rubriflora and Thalictrum foetidum subsp. Glabrescens. (4) The limestone ranges, concerned with (3), on one hand, reserve some plants of colder regions, such as Allium splendens, Artemisia Schmidtiana, Berberis amurensis var. Bretschneideri, Bupleurum longiradiatum f. elatius, Hypericum yezoense, Juniperus Sargentii, Leontopodium japonicum, Spiraea Miyabei and Thymus serphyllum subsp. quinquecostatus, and Juniperus rigida.

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The writer investigated the vegetation in the southern part of the Shima Peninsula. The forest and sea coast communities in this area are remarkable. (1) Shiia Sieboldi-Athruphyllum neriifolium community, Machilus Thunbergii-Rumohra aristata community and Quercus phylliraeoides community are found as a climatic climax forest. Especially, the first community is quite similar to those of the Pacific coastal areas in Shikoku and Kyushu, and it shows the very characteristics features of that in the area where the oceanic warm climate influences on. Both second and third communities are commoner ones seen over the warm regions, from Izu down to Osumi. (2) Pinus Thunbergii-Pittosporum Tobira community, Pinus Thunbergii-Dicranopteris dichotoma community and Quercus serrata-Pleioblastus Chino community develop as a secondary forest. But in most cases, the first one is confined to the coastal area as an edaphic climax. The plateau of the coastal area is occupied by the second one. The last is deciduous one which widely covers all over Japan, but is found very small in number in this area. (3) Sea coast communities are Chrysanthemum Shiwogiku var. kinokuniense community, Vitex rotundifolia community and Crinum asiaticum var. japonicum community etc. Of these communities, the first shows the local characteristic features of that on this sea coast.

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