中之島・訪諏之瀬島(トカラ列島)の蘚苔類フロラ(第11回大会講演要旨)
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概要
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This paper deals with the bryophyte floras of Nakanoshima and Suwanosejima Islands in the Tokara Islands, located in the transitional part between the subtropical and the warm-temperate zones of Japan. As the result of a study of about 2000 specimens collected from these two islands, the followings were recognized: 28 families, 41 genera and 82 species of the Musci, 24 families, 37 genera and 68 species of the Hepaticae and 1 family, 3 genera and 3 species of the Anthocerotae. The bryophytes whose distributions in Japan are limited to the regions north of the Tokara Islands are as follows: Brachythecium plumosum var. brevisetum, Ditrichum heteromallum, Fauriella tenuis, Funaria hygrometrica, Micromitrium tenerum, Oncophorus crispifolius, Pseudoleskeopsis zippelii, Racomitrium canescens, Sphagnum cuspidatum, Syrrhopodon japonicus, Weissia controversa; Calypogeia tsukushiensis, Cololejeunea, japonica, Gymnomitrion noguchianum, and Scapania parvitexta. The species that have the northernmost limit of their distributions in the Tokara Islands are Rhacelopodopsis camusii, Rhizogonium spiniforme var. ryukyuense and Kurzia lineariloba. As bryophytes which are generally found in volcanic regions, Campylopodium euphorocladum and Gymnomitrion noguchianum are cited. From these results, we may conclude that the flora of bryophytes in the Tokara Islands is more closely related to the flora of the southern Kyushu than that of the Ryukyu Islands south of Amamiohshima Island.
- 日本蘚苔類学会の論文
- 1982-11-15
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