Rose clover (Trifolium hirtum) is an annual herb that is often included in cover crop mixtures for vineyards, not in the least because as a legume it has the ability to fix nitrogen. With a tap root that can extend up to 78 inches in depth, rose clover is a valuable cover crop to sew in hillside vineyards that have problems with soil erosion. A native of Europe, rose clover often out-competes native clovers, however, it seems to be happily growing alongside a lot of hop clover, white clover and a tiny bit of crimson clover in Vinoland.
I don't think I have ever seen as much rose clover as I have seen this spring, it's everywhere. And not just on the slope above the homestead.