The root bark is used to make a colour-fast red dye.
Names
Scientific
Oldenlandia umbellata
Synonym
Hedyotis umbellata
English
Chay root
Choy root
Dutch
Chay
Taxonomy
Order
Gentianales
Family
Rubiaceae
Genus
Oldenlandia
Species
Oldenlandia umbellata (Chay root)