OK, the Umbellifers are one group of plants you don't mess with unless you are 100% certain; they contain two deadly poisonous species and a couple of harmful ones. When young with only basal leaves many look very similar (actually, they do when older as well but not quite as much). It is possible to mistake young Alexanders with something like Hemlock Water Dropwort (Oenanthe crocata) which you don't even want to touch to be honest.
I would leave it alone until the flower shows and you can do a 100% positive ID. Just my opinion, there may be more expert advice on here though.