Redcow, I think you got it. I googled cinquefoil. Looks like that might be what it is. The one variety is native to MN. That's why I can't find the plant by searching invasive species. [interesting plant] Used as a herb and for medicinal purposes. This plant first arrived on the ranch about 5 years ago and has spread over some large areas. Cattle do like the stuff, and will graze it right with the grass. don't know the nutrients? Stays green and leafy into cold weather. Trouble is it crowds the grasses. Thanks all!