Any of various herbs of the genus Amaranthus.
A red to purple azo dye used as a biological stain, and in some countries in cosmetics and as a food colouring.
The characteristic purplish-red colour of the flowers or leaves of these plants.
The seed of these plants, used as a cereal.
Amaranthus species
Polygonum aviculare (common knotgrass)
Portulaca bicolor, of Australia
Heracleum sphondylium
Any of various weedy plants sometimes used as pig fodder
Chenopodium album, white goosefoot