What is "oonopsis"

Oonopsis, false goldenweed, is a genus of flowering plants in the daisy family.

1. Oonopsis engelmannii (A.Gray) Greene - Kansas, Colorado
2. Oonopsis foliosa Greene - Colorado
3. Oonopsis multicaulis (Nutt.) Greene - Wyoming, Montana, Nebraska, South Dakota
4. Oonopsis wardii (A.Gray) Greene - Wyoming, Colorado