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

Microstegium japonicum (Miq.) Koidz.






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

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)
索引

Microstegium japonicum in Hokkaido


var. boreale (キタササガヤ)

ST1 ST2 ST3
ST4 ST5 ST6
[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.

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