vegetative -
relating to involuntary bodily functions; "vegetative functions such as digestion or growth or circulation"
involuntary not subject to the control of the will; "involuntary manslaughter"; "involuntary servitude"; "an involuntary shudder"; "It (becoming a hero) was involuntary. They sank my boat"- John F.Kennedy
vegetative -
composed of vegetation or plants; "regions rich in vegetal products"; "vegetational cover"; "the decaying vegetative layer covering a forest floor"