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(First upload on July 8 2024. Last on July 21 2025) [ 日本語 | English ]

Sisyrinchium L. (ニワゼキショウ) Hitofusa-niwazekisyou (ヒトフサニワゼキショウ, 一房庭石菖), needle-tipped blue eyed grass Life form: perennial herb with 40 cm in height Distribution: North America (East Coast - New England - west across Ontario - central Canada - North Dakota) exotic to Japan Hokkaido Blue List: B, firstly reported from Onbetsu in the case of Hokkaido(Murata 1982)

Habitat: forest edges, meadows and fields, shores of rivers and lakes Leaf: less stalk Stem: wingless Flower color: blue to purple or white Synonyms: Sisyrinchium intermedium Bickn.

Sisyrinchium mucronatum in Hokkaido

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1 2 3
[1] along Bansei Primitive Flower Garden, Taiki Town, on June 23 2025. [2/3] within a flower bed under a street tree near a large building, N19/W4, North Ward, Sapporo. [2] on June 5 2024. [3] on June 13 2024.