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Taxonomic studies of Cirsium (Asteraceae) in Japan V. Cirsium umezawanum, a new species from Island Rishiri, Hokkaido and a new white-flowered form of Cirsium amplexifolium Kitam



Taxonomic studies of Cirsium (Asteraceae) in Japan V. Cirsium umezawanum, a new species from Island Rishiri, Hokkaido and a new white-flowered form of Cirsium amplexifolium Kitam



Bulletin of the National Science Museum Series B (Botany) 24(4): 147-156



A new species of Cirsium, C. umezawanum Kadota, and a new white-flowered form of C. amplexifolium Kitam. are described here. Cirsium umezawanum is described based on the collection from Isl. Rishiri, Hokkaido, and is characterized by having 1) erect capitula, 2) 8-9-seriate involucral phyllaries, 3) the absence of glandular bodies on inner phyllaries, 4) patent phyllaries with long recurved tips and 5) longer corolla throats than corolla tubes.

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Accession: 011454720

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