Growing alongside a lab road i found Hoary false-alyssum (Berteroa incana). This is in the mustard family and will grow as an annual or biennial depending on when it germinates. I saw several
bees, flies, and wasps on the flowers (i will try to ID those and post later). If consumed as a large proportion of
feed, it can be toxic to horses.
First photo is of the flowers.
Second photo is of the leaves. The plant starts with a basal rosette, but those leaves whither as it goes to seed.
Third photo is of the seed pods.
Fourth photo is of the whole straggly plant (flowers on left of frame and stem base on lower-right). I will try and get a better picture.
Last photo i'm pretty sure is the basal rosette of a plant that will go to seed next year. At least, both plants have the same bland brassica flavor.