Caper spurge (Euphorbia lathyris)

Caper spurge (Euphorbia lathyris) is widely recognized as an invasive weed and is toxic to humans and nearly all livestock. Interestingly, some goats can consume caper spurge without adverse effects. However, the toxins from the plant can be transferred to the goat's milk, rendering it unsafe for human consumption. Despite its toxicity, caper spurge is sometimes used to repel moles and gophers from gardens.