I got way too busy for a couple of weeks, and it decided to get hot right in the middle of that time -- so of course various things in my early salad stuff have bolted like crazy.
Arugula flowers are, first of all, surprisingly beautiful. I know this isn't meant to be a site for ornamental gardening -- but while they're simple things, not all the kind of bright showy stuff people normally plant for flowers, I'd be happy to find these in any patch of cultivated "wildflowers". They're white, four-petaled, purple-veined, about an inch across -- and all that delicacy makes an interesting contrast with the tall spiky stems and deeply cut leaves.
And as it turns out, they're edible and attract pollinators.