Utah State University Extension
This fact sheet describes puncturevine, a prostrate-growing annual plant that is particularly undesirable because it produces a spiny fruit that can injure animals and flatten tires. It can also be toxic to livestock and is difficult to control due to continual germination throughout the summer.
Zesiger, Cody and Ransom, Corey, "Puncturevine (Tribulus terrestris) Identification and Management for Gardens, Lawn, and Pasture" (2019). All Current Publications. Paper 2062.