Rusty Hinge 2 wrote:
The message
from Sacha contains these words:

It means the same thing - black head - but 'Zwartkop' is what is given in
the Plant Finder and I wondered if it could be Afrikaans. I have always
known it as 'Schwarzkopf', though.

Schwarzkopf is German.

Zwartkop is similar: kop is certainly an Africaans word, but much
Africaans is derived from Dutch, and I'd guess 'Zwart' is either Dutch,
or Africaans, or both.

I'll ask Richard Bos...

An aside here, it always makes me smile when I see the adverts for
'Schwarzkopf' ladies cosmetics, fancy using something called blackhead!