Now that explains a lot. Bindweed made this under the driveway, that was Herbarium worthy
Colorado Department of Agriculture
It’s a bindweed (Convolvulus arvensis) tuber that was excavated in Fort Collins under a driveway and given to Dr. Harold Harrington. (Harrington was one of the most influential early botanists in Colorado, and was the curator for CSU Herbarium for about 25 years.)
The curly white roots extend from the sides and the tops of the large tuber. The massive size of this tuber underground is one of the main reasons bindweed is so persistent and difficult to control.