Meaning : All the plant life in a particular region or period.
Example :
Pleistocene vegetation.
The flora of southern California.
The botany of China.
Meaning : The process of growth in plants.
Meaning : An abnormal growth or excrescence (especially a warty excrescence on the valves of the heart).
Meaning : Inactivity that is passive and monotonous, comparable to the inactivity of plant life.
Example :
Their holiday was spent in sleep and vegetation.