This looks like a kind of onion growing in a neglected yard. We see the roots and stems of onions, if the green part is a stem, but we never see such things as this at the market. Stores offer a very narrow range of plant life. We don’t find onion seeds or onion blooms, though I think there's something called onion salt. In fact, these may have nothing to do with onions, but it’s all I can come up with. Round balls of bloom. Edible or inedible? I think I’ll leave that to someone with more gusto for life and a greater inherent sense of experiment. I’m reminded of a line that Google has not helped with, though I thought it was from Ben Johnson’s dictionary. Maybe I just improved on Swift a bit. “Brave was he who first of oysters ate.” Indeed.