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Abstract
九州南部・琉球列島地域のボタンボウフウ(広義)の外部形態(茎の直径と長さ,花茎長,植物体の高さ)と生態特性(開花期間,繁殖様式)の地理的変異を明らかにして,分類学的再検討を行った。その結果,3つにタイプわけできた。i)植物体の高さは100cmほどで秋に開花をし,多回結実性の植物を多く含む集団群,ii)植物体は150cmを超え,主に夏に開花をし,一回結実性の植物のみからなる集団群,iii)植物体の高さは約100cmで,夏に開花し,多回結実性植物を含む集団群。これらの集団群は地理的にもまとまりを示し,最初のタイプは九州西部から北に,二番目のタイプは九州南部からトカラ列島(宝島を除く)まで分布しそれらはボタンボウフウ(狭義),コダチボタンボウフウに一致している。三番目のタイプは宝島,奄美大島以南によくみられ,それをナンゴクボタンボウフウと呼ぶことを提案する。
Four morphological characters (stem diameter, stem length, flowering shoot length and plant height) and two life history traits (flowering period and reproduction mode) were analyzed to clarify the presence or absence of infraspecific taxa within the Peucedanum japonicum complex which have a great variation in morphology and life history and, if present, their respective distinct features. Consequently three varieties could be distinguished within the P. japonicum complex. Two varieties agree with var. japonicum and var. latifolium which were already proposed. The third variety is distinct from them in having more deeply incised leaflets and narrower leaflets with acute tips and thus was proposed as a new variety australe. A key to the three varieties was also provided.
Journal
- Acta phytotaxonomica et geobotanica [List of Volumes]
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Acta phytotaxonomica et geobotanica 51(1), 99-116, 2000-09-12 [Table of Contents]
The Japanese Society for Plant Systematics