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(First upload on June 6 2013. Last on February 20 2024) [ 日本語 | English ]

Sisyrinchium rosulatum E. P. Bicknell






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Sisyrinchium L. (ニワゼキショウ)
Niwazekisyou (ニワゼキショウ, 庭石菖), annual blue eyed grass
Life form: annual-perennial herb
Distribution: exotic to Japan (including Hokkaido)
Habitat: colonizing in grasslands, such as lawns
Flower color: diverse (white - pink - purple)
Chromosome number: 2n = 32
Synonyms:

Sisyrinchium atlanticum auct. non E. P. Bicknell
Sisyrinchium angustifolium auct. non Mill.

索引

Sisyrinchium rosulatum in Japan


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[1-3] at West Ariake Pier Park, Tokyo, on May 12 2013. [4-6] at the imperial gardens in the former lawn (Shiba) detached palace, Tokyo, on May 29 2015. [7] in Oi Pier Seaside Park, Tokyo, on June 3 2016. [8/9] on a lawn near the entrance of Mount Mihara on Izu-Oshima Island (伊豆大島) on June 7 2023.



Sisyrinchium micranthum Cav.

Oh-niwazekisyou (オオニワゼキショウ, 大庭石菖), blue pigroot or striped rush-leaf

scientific name had not been assinged, due to the confusion - assigned

Lifeform: perennial herb
Distribution: North America
Habitat: disturbed sites, such as lawns and roadsides
Assigned name: S. micranthum Cav.
Synonyms (as a result)

Sisyrinchium sp. aff. iridifolium Kunth
Sisyrinchium iridifolium Humb.Bonpl. et Kunth var. laxum Maekawa, incorrect

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[1/2] these plants flowered with Sisyrinchium rosulatum in the park on the same day.

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