Weld

A plant that was desired in medieval europe for its ability to produce a nice yellow dyestuff from its leaves or flowers. Colour of this dyestuff varies from a nice clear yellow to a duller greenish yellow, depending upon factors such as the mordant used and the minerals in the tap water used for dying.

Fabrics dyed with weld were often overdyed with blue woad to produce a green coloured fabric.

A nice article about dying with weld is at: [[1]]