Texas Gardening: Texas Native Plant Pictures by color ( Other & Bicolor ), 1 by htop

htop wrote:
Common Cocklebur, Rough Cocklebur (Xanthium strumarium var. glabratum)

The very conspicuous, hard, spiny, football-shaped fruits have many spines and contain 2 compartments that each house 1 seed. One of the seeds in each bur may germinate the following year with the other seed taking at least 2 years to germinate. The burs stick to fur and clothing and can be very difficult to extract. Often they form tangled clots in the fur of animals which have to be cut out.