日本産アザミ属の分類学的研究XII.新亜節オニアザミ亜節及びこれに属する1新種,ハチマンタイアザミ

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A new species of Cirsium, C. hachimantaiense Kadota, is described from Mt. Hachimantai, located at the border area among Akita, Aomori and Iwate Prefectures, northern Japan. Cirsium hachimantaiense is characterized by the presence of basal leaves at anthesis, nodding large capitula, bowl-shaped and exceedingly glutinous 7-8-seriate involucres and corolla tubes almost as long as throats. Based on these attributes C. hachimantaiense belongs to subsect. Schantarensia (Kitam.) Kadota [=ser. Schantarensia Kitam.]. However, the type species of the subsection, C. schantarense Trautv. & C. A. Mey., has not basal leaves at anthesis. A new subsection, subsect. Nipponensia Kadota, is therefore proposed for the other species of the former subsect. Schantarensia except for C. schantarense. Subsect. Nipponensia is consisted of at least eight species and is distributed in Japan (northern to western Honshu) and Taiwan.
2004-09-22