This is a pioneer that has started growing in an area I cleared when I was setting up camp. Only watered by the sparse rains, in the full sun. It is a clump about 1.5 feet across and about 8 inches tall.
It's hard for me to tell from the photo on my little phone screen but it looks like it could be a cress. Maybe winter cress? We have lots of that in winter. Very bitter in warm weather but when it's freezy out it's pretty good