Cirsium boninense
{{Short description|Species of plant}}
{{Speciesbox
| image = Cirsium boninense.jpg
| genus = Cirsium
| species = boninense
| authority = Koidz.
}}
Cirsium boninense is a species of thistle in the family Asteraceae that is endemic to the Bonin Islands of Tōkyō Metropolis, Japan.{{cite journal |url=https://www.biodiversitylibrary.org/page/43535656 |title=Plantae novae Japonicae II |language=la |author=Koidzumi, G. |journal=The Botanical Magazine |issn=0006-808X |year=1914 |volume=28 |number=331 |pages=171–173 [172]}}{{cite book |script-title=ja:日本の固有植物 |trans-title=Endemic Plants of Japan |language=ja |author1=Katō, M. |author-link=:ja:加藤雅啓 |author2=Ebihara, A. |author-link2=:ja:海老原淳 |date=March 2011 |publisher=Tokai University Press |isbn=978-4-486-01897-1 |pages=138, 258, 373}}
Taxonomy
The species was first described by Japanese botanist Gen-ichi Koidzumi in 1914. The specific epithet relates to the type locality (Chichijima) in the Bonin Islands.
Description
Cirsium boninense is a perennial plant with white flowers from May to June that grows to a height of {{convert|40|-|150|cm}} among the grasses and rocks in coastal areas, as well as on the forest floor.{{cite web |url=https://tokyo-rdb.metro.tokyo.lg.jp/index.php |script-title=ja:オガサワラアザミ |trans-title=Cirsium boninense |language=ja |publisher=Tokyo Metropolitan Government |access-date=7 May 2022}}{{cite web |url=https://www.kahaku.go.jp/research/db/botany/azami/detail.html?no=34 |script-title=ja:オガサワラアザミ |trans-title=Cirsium boninense |language=ja |publisher=National Museum of Nature and Science |access-date=7 May 2022}}
Conservation status
Cirsium boninense is classed as Near Threatened on the Ministry of the Environment Red List.{{cite web |url=https://ikilog.biodic.go.jp/rdbdata/files/redlist2020/redlist2020_ikansoku.csv |script-title=ja:維管束植物 |trans-title=Vascular Plants |language=ja |publisher=Ministry of the Environment |date=27 March 2020 |access-date=7 May 2022}}{{cite book |script-title=ja: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）|trans-title=Red Data Book 2014 — Threatened Wildlife of Japan — Volume 8, Vascular Plants |language=ja |editor=Ministry of the Environment |publisher=Gyōsei Corporation |year=2015 |isbn=978-4-324-09902-5 |page=613}} According to the Red Data Book Tokyo, though decreasing on Chichijima, numbers are increasing on {{ill|Muko-jima|ja|聟島}} and Nakōdo-jima.
See also
References
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Category:Flora of the Bonin Islands