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(First upload on August 4 2021. Last on October 10 2023) [ 日本語 | English ]

Microstegium Nees, auct. non. Lindb. (アシボソ) M. japonicum (Miq.) Koidz. Sasagaya (ササガヤ, 笹萱, s.l.), East Asian glabrate browntop Lifeform: clump-forming annual grass, with 30-70 cm in height Distribution: China - Korea - Japan Habitat: roadsides, grasslands and forest edges Chromosome number: 2n = 20 var. boreale (Ohwi) Ibaragi et Yonek. (キタササガヤ, 北笹萱) hair on the nodes

Synonyms (also see Leptatherum): Microstegium nudum (Trin.) A.Camus var. boreale (Ohwi) Ohwi Leptatherum boreale (Ohwi) C.H.Chen, S.C.Kuoh et Veldkamp var. boreale Eulalia borealis (Ohwi) T.Koyama var. borealis var. japonicum Sasagaya (ササガヤ, 笹萱, s.s.) Distribution: probably not in Hokkaido (Sato et al. 2022) Leptatherum Nees (ササガヤ), when separated L. japonicum Franch. et Sav.

var. boreale (Ohwi) Ibaragi et Yonek. (キタササガヤ) var. japonicum (ササガヤ)

Microstegium japonicum in Hokkaido

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var. boreale (キタササガヤ)

1 2 3
4 5 6
[1-3] near the main entrance in Nopporo Forest Park on July 17 2021. [4-6] in an area, where the Otaru-Yoichi wind farm was planned, observed on June 15 2023. Records: along a trail on Mount Kuromatsunai, southern Hokkaido, on June 12 2024.