日本産アザミ属の分類学的研究XV.西日本産の4新種

概要

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A new subsection and four new species of the genus Cirsium in Japan are reported here. Cirsium masami-saitoanum Kadota is described from southern Kyushu and characterized by cylindrical involucres and recurved involucral phyllaries. Cirsium pseudosuffultum Kadota described from the Shikoku Mountains has been confused with C. suffultum (Maxim.) Matsum. from Kyushu and the former is distinguished from by having linear glandular bodies (vittae) as well as cylindrical involucres and recurved involucral phyllaries. Cirsium ohminense Kadota is described from the Kii Mountains and is characterized by having well branched stem, cylindrical involucres, recurved involucrl phyllaries and lanceolate glandular bodies. A new subsection of sect. Onotrophe (Cass.) DC., subsect. Suffulta, is proposed for the four species above stated. The subsect. Suffulta also includes C. chikushiense Koidz. and C. yakushimense Masam. Cirsium lucens Kitam. var. opacum Kitam. is recognized as a distinct species, C. opacum (Kitam.) Kadota within the subsect. Megaphylla of sect. Onotrophe.
2006-06-22