The Vegetative Soul in Aristotle's System

The soul is sort of like the essence of the organism. It's like what the form of the organism apart from its physical body. While the vegetative soul here is defined by nourishment and reproduction, animals and humans additionally have capacities of sensation and rational thought added atop these baser soul characteristics. People have made some spurious claims about evidence for rational thought in plants. But I'd say it's completely uncontroversial that plants experience a form of sensation.