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Cirsium toyoshimae (トヨシマアザミ, Toyoshima-azami) is an extinct species of thistle in the family Asteraceae that was endemic to the Bonin Islands of Tōkyō Metropolis, Japan.[2][3]

Cirsium toyoshimae
Conservation status
Extinct[1]
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Cirsium
Species:
†C. toyoshimae
Binomial name
†Cirsium toyoshimae

Taxonomy


The species was first described by Japanese botanist Gen-ichi Koidzumi in 1919.[2]


Description


Cirsium toyoshimae had pale purple flowers and soft spines and was somewhat smaller than the extant Cirsium boninense.[3][4] It used to grow in wooded areas near the coast.[4]


Conservation status


Cirsium toyoshimae is classed as extinct on the Ministry of the Environment Red List.[1][5]


References


  1. Ministry of the Environment, ed. (2015). レッドデータブック2014 —日本の絶滅のおそれのある野生生物— 8 植物I（維管束植物） [Red Data Book 2014 — Threatened Wildlife of Japan — Volume 8, Vascular Plants] (PDF) (in Japanese). Gyōsei Corporation. p. 8. ISBN 978-4-324-09902-5.
  2. Koidzumi, G. (1919). "Contributiones ad Floram Asiae Orientalis". The Botanical Magazine (in Latin). 33 (389): 110–122 [115]. ISSN 0006-808X.
  3. トヨシマアザミ [Cirsium toyoshimae] (in Japanese). National Museum of Nature and Science. Retrieved 7 May 2022.
  4. トヨシマアザミ [Cirsium toyoshimae] (in Japanese). Tokyo Metropolitan Government. Retrieved 7 May 2022.
  5. 維管束植物 [Vascular Plants] (in Japanese). Ministry of the Environment. 27 March 2020. Retrieved 7 May 2022.


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