Vegetable Physiology sometimes manifests itself as green, yellow, orange or other vegetable-colored skin, ability to grow vegetables from the body which produce one or numerous effects (and/or vegetables can be eaten as food), (sometimes) generation of prehensile vines.
Of course, the food generated is often edible (in fact, almost always), and can be used to feed subjects as thought it was normal food that came from the ground. And in many cases, numerous vegetables can be generated from one user (perhaps collard greens, lettuce, zucchini, cucumbers, and the like), instead of, say, just pumpkins, just squash or the like.
Of course, this ability is often accompanied by a heightened awareness of and sympathy toward plant life (one with this power can come to see the importance of plant life to the environment), and conscientious readiness to research the health values (or other uses) of the vegetables they produce. This ability often also results in the user becoming vegetarian (at least primarily), as vegetables will be the most easy food for the user to come across.
Sometimes the user may develop his power so that he can actually consciously manipulate the vegetables he produces (instead of the vegetables just growing randomly), even though the power will still be restrained within the plant class "vegetable"
This ability may only produce (or mimic the properties and amplified capabilities of) vegetables, not fruits, not grains (no corn or wheat) and not normal plants or fungi.