Black dicks

In the Netherlands there is a discussion wether we keep names of all kind of things as we do for centuries or give it a new name because a little part of the people living in the Netherlands think it is discrimination.
The bloom of the Lisdodde is called for centuries "negerpiemels" or a free translation "black dicks".
When you say so every one knows what flower you mean. Lisdodde is not kown as a common name.