I just bought a plant for my butterfly garden. On looking it up I see that it is Mimulus -- commomly called "Monkey Musk". The flowers look like monkey faces and it smells of musk, giving it an obvious meaning.
Mimulus is native to Southern North America, Australia, parts of Asia, and parts of Africa.
Not to the British Isles. However it has become naturalized in Scotland (and probably in England). I can't find out when it was introduced to Scotland or by whom.
So -- I'm wondering if "Monkey Musk" is in fact the older name and Monymusk the coruption.
Cheers, Joy