One thing to say is for goodness sake don't even think of eating any umbellifer on the basis of someone else's identification, even (especially) mine. I say this because you might read that cow parsley is edible, which it is, but some other umbellifers are awfully similar if you don't know what you are looking at, and they can be seriously, potentially fatally, toxic.
I know you haven't said anything about eating it, but better safe than sorry.