<国立科博専報>富士山のトリカブト属植物(キンポウゲ科)について

概要

論文の詳細を見る
1. Twenty one populations of Aconitum from Mt. Fuji of Central Japan have been studied with the aim to determine the taxonomic status of"A. isidzukae". Structure of each population has also been preliminarily reported in this paper. Locality of each population is given in Table 1 and Figure1. 2."A. isidzukae"was formerly treated as a distinct species, being inhabited exclusively in stony places of Mt. Fuji, characterized by having erect stem and straight and spreading hairs on stem and leaf. But these traits should not be regarded to characterize specifically the plant in question because they are also found in individuals which indoubtedly belong to A. senanense. On the other hand, the aconite from Osawa differs from A. senanense in having much branched stem and a wide range of variation of stamen pubescence. So it seems more appropriate to treat the aconite from Osawa as a variety of A. senanense : Aconitum senanense Nakai subsp. senanense var. isidzukae (NAKAI) KADOTA stat. nov. A. senanense ssp. senanense var. isidzukae is presumed to be a taxon, which has differentiated from the polymorphic species A. senanense in relatively recent days at the alpine zone of Mt. Fuji. This aconite falls in the category of the Fuji-Hakone Elements (HARA, 1959). 3. It becomes clear that the aconite populations of Mt. Fuji are very complicated. Population 15(Fig. 1) is composed of A. senanense ssp. senanense var. isidzukae, A. napiforme ssp. montanum var. montanum and their intermediates, and the populations around Osawa (Fig. 1,1-14) consist of A. senanense ssp. senanense var. isidzukae and the intermediate forms (Fig. 4). Furthermore, population 18 (Mt. Kyogatake, 2,320m) includes A. grossedentatum, the above-mentioned taxa, and their intermediate forms which can be divided into four kinds (Fig. 5). These intermediates are presumed to be products of introgressive hybridization between the related taxa. A similar situation has been observed in the A. senanense-micranthum complex from the Akaishi Mountain Range (KADOTA, 1981). It is supposed that the occurrence of such a complicated composition of the populations of Mt. Fuji may be relevant to frequent volcanic activities of the mountain : the alpine vegetation of Mt. Fuji holding the Aconitum habitats might have been completely destroyed by a previous volcanic activity; next, in the course of regeneration of vegetation, invasion of teh taxa which have inhabited in the northern ranges (Tenshi-Misaka-Doshi-Tanzawa Ranges, Fig. 6) of older origin into Mt. Fuji might have taken place; subsequently, introgressive hybridization might have occurred between the taxa.
国立科学博物館の論文
1982-12-01

<国立科博専報>富士山のトリカブト属植物(キンポウゲ科)について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク