(First upload on November 17 2010. Last on October 24 2015) [ 日本語 | English ]

Echinochloa crus-galli (L.) P. Beauv.

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

Echinochloa P. Beauv. (イヌビエ)
Inubie (イヌビエ, 犬稗, s.l.), cockspur (cockspur grass)
Life form: turfed, weedy annual grass
Distribution: Originally in tropical Asia and Africa (ancient exotic to Japan)
Habitat: disturbed areas, such as roadsides, ditches, and furrows of paddy fields

Field training on integrated environmental research (統合環境調査法実習) species list (種リスト)

Chromosome number: 2n = 54
Synonyms (discarded):

Echinochloa crus-galli (L.) P.Beauv. var. caudata auct. non (Roshev.) Kitag.

Echinochloa crus-galli (L.) P.Beauv. var. austrojaponensis Ohwi s

Varieties (diverse and confusing)
var. aristata Gray (ケイヌビエ)

f. kanashiroi Ohwi (ウスゲケイヌビエ)

var. crus-galli (イヌビエ, s.s.)
var. formosensis Ohwi (ヒメタイヌビエ), south to Kanto District
var. praticola Ohwi (ヒメイヌビエ)

Echinochloa crus-galli in Hokkaido

var. crus-galli

[1] at Shirogane Falls, Ofuyu Cape, on October 12 2010. [2] a grassland dominated by E. crus-galli. [2/3] in front of the backgate of Hokkaido University of Education at Hakodate on September 20 2011. [4] at a roadside between Japanese archery training house and tennis courts, HU, on August 20 2015. [5/6] at a waste land, N20/W7, north Ward, Sapporo, on August 31 2012. Record: on a grassland in Fujimi Road Station, northern Hokkaido, on August 29 2018.; in a mesic waste land on N25/W3, North Ward, Sapporo, on August 31 2018.

var. aristata

[5/6] At a garden by Sub-Ranger House, Toyotomi Town, on October 13 2010. Because this garden is frequently cut for keeping a lawn, the plants become shorter than usual.