(Upload on March 26 2011) [ 日本語 | English ]

Amaranthus albus L.

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

Amaranthus L. (ヒユ)
Himeshirobiyu (ヒメシロビユ), prostrate pigweed or tumble pigweed
Lifeform: annual forb
Distribution: the tropical Americans (exotic to Japan)

Category B in Hokkaido Blue List 2010

Habitat: widespread weed on ruderal habitats, e.g., waste ground, cultivated areas, disturbed sites, roadsides, and railroads

Field training on integrated environmental research (統合環境調査法実習)

HUSTEP: Plants and Plant communities in Japan (flora list)

Flower: monoecious, male and female organs are produced in different flowers on the same plant

Amaranthus albus L. var. pubescens (Uline et Bray) Fernald
Amaranthus graecizans auct. non L. p. p.
Amaranthus graecizans L. var. pubescens Uline et Bray
Amaranthus pubescens (Uline et Bray) Rydb.


Amaranthus albus in Hokkaido

[1] a patch. [2] a shoot. [3] top of a shoot. [1-3] in a parking lot, northern Hokkaido, on September 13 2010.