Madder – meaning of the word and examples

A Eurasian herb (Rubia tinctorum of the family Rubiaceae, the madder family) with whorled leaves and small yellowish panicled flowers succeeded by dark berries. (Merriam – Webster)

The root of the Eurasian madder used formerly in dyeing

Any plant of the genus Rubia, especially the climbing R. tinctorum, of Europe, having open clusters of small, yellowish flowers. (Dictionary.com)

Example

Madder (Rubia tinctorum)

https://www.saltspringseeds.com/products/madder-rubia-tinctorum