I have several of these just starting to bloom in my garden. It's in what is a new bed this summer somI know it's not anything reseeding from some previous year. It looks like some kind of aster or mum maybe. I planted a lot of seeds, some sweet William, bachelor buttons, and carnations. But I don't recal planting anything like asters or mums. There are some others that haven't opened up as much that look like they'll have some slight pink and purple around the tips of the petals. It's going to drive me nuts if this is growing in the garden and I don't know what it is, so any help,would be appreciated. Thanks.