Hundkäx, Anthriscus silvestris, is ‘wild chervil’. (The plant that is, spelled kex it could mean ‘dog biscuit’: Hund is ‘dog’ and kex is ‘biscuit’ a loan from English: cakes.) But this käx is more difficult. It could be an old word meaning ‘hook’. Tarmkäx, ‘mesentery’ probably also contains this word.
Hundkäx is a weed, but it is lovely to look at too. There is an English name for it that is equally romantic: Queen Anne’s laces. That is used for this plant and other similar members of the Umbelliferae family such as wild carrots.