Antennaria parlinii

Looks like dog fennel, Eupatorium capillifolium. It's a weedy native and not typically part of a seed package. My neighbor has a huge stand of it. Dog-fennel Thoroughwort (delawarewildflowers.org)

I agree. Radish, or else something so closely related it *thinks* it's a radish, lol. I'm terrible about letting my radishes bolt instead of uprooting them and composting them before they go to seed, so I've seen many a radish bloom. But even without the bloom, the leaves are very indicative of radish.

@Marie Tulin - My "meadow" was an existing feature of a house we bought at the end of April, so I don't know it's history other than what I can suss out from observation. Soil is not fertile and probably received almost no maintenance for many years as the house was rented by non-gardeners, or casual gardeners at most. I do know how to key out plants, but my main goal of posting here is to stimulate conversation, connect with other avid gardeners and generally engage with people over something positive. My hope is that time spent here is time not spent doomscrolling, by me or by others. Learning which species are growing in my garden from fellow plant nerds is way more interesting and rewarding, hopefully for all involved, than sitting down with a key. I also prefer actual gardening to talking about gardening online;-) so that's where I spend most of my time.