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15 plants that could kill you

By: Bryan Nelson on Feb. 19, 2016, 10:35 a.m.
White snakeroot

Photo: Homer Edward Price/flickr

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White snakeroot

White snakeroot contains the toxin tremetol, which can be poisonous if consumed directly or second-hand. When snakeroot is eated by cattle, the animals' beef and milk become contaminated with the toxin, and ingesting those substances can lead to a condition called milk sickness. Abraham Lincoln's mother, Nancy Hanks, reportedly died after swallowing snakeroot-contaminated milk.

Human disease is uncommon today because of current practices of animal husbandry and the pooling of milk from many producers, but milk sickness does still occur.