35+ Most Poisonous Plants Background. Many poisonous plants are so common and seemingly innocuous you do not suspect their toxic qualities. Some common species rank as the deadliest plants in the world.
Poisonous plants and weeds can harm you and your pets. Many toxins in plants have evolved to defend the plants from insect, pests and other predators. Wild parsnip plant (pastinaca sativa).
Dealing with a pet that has been poisoned is scary and can.
Many poisonous plants are so common and seemingly innocuous you do not suspect their toxic qualities. Some plants poisonous to humans and animals. They may seem innocuous, but some plants can be deadly. However, the most common problems with poisonous plants arise from contact.