日本産アザミ属の分類的研究XI.九州南部からの1新亜節とそれに属する2新種

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A new species of Cirsium, C. nippoense, is described from the border area between Miyazaki and Oita Prefectures. Cirsium nippoense is characterized by the absence of basal leaves at anthesis, erect or oblique capitula, well-branched stem with divaricate branches, glutinous involucres with narrowly lanceolate glandular bodies and the chromosome number 2n=68. Cirsium tanegashimense from Is. Tanegashima, Kagoshima Prefecture, is similar to C. nippoense, however the former is different from the latter in the absence of glandular bodies on involucres and 6-seriate involucral phyllaries. Cirsium tanegshimense is also described here because the name was a nomen nudum. A new subsection of Sect. Onotrophe (Cass.) DC., Subsect. Ramosa, comprising both C. nippoense and C. tanegashimense, is described. Subsect. Ramosa is endemict to Japan and is restricted to the southern part of Kyushu, southern Japan.
2004-06-22