5 Surprising Ways Plants Taste Their World (Plus 22 Species That Do It Best)

22. Milkweed (Asclepias spp.)

Milkweed plants can “taste” when monarch caterpillars begin to feed on them by detecting chemicals in their saliva.
In response, milkweed ramps up production of toxic cardenolides, making the leaves less palatable and protecting themselves from overgrazing. Read more