i want to save some seeds from my plants of asters and bachlor buttons . where do i find the seeds in them and what do they look like
Annual asters and bachelor buttons develop seeds in the base of where the flower once was. On the link below, you can check out the page for Centaurea cyanus (Bachelor Buttons.) They don't have one for the annual asters, but that flower is similar in how you find the seeds.
Here is a link that might be useful: The Seed Site Page for Centaurea cyanus (Bachelor Buttons.)