To establish a population in a new area, often spreading and becoming dominant.
Colonise
Tending to spread aggressively and harmfully, especially of a non-native plant.
Invasive
A plant or animal that establishes itself in a place where it is not native or wanted.
Intruder
(For plants) Strong, healthy, and growing quickly and strongly.
Vigorous
Main or most important.
Primary
To regrow or be regrown; to form again after being damaged or removed.
Regenerate
Having a very harmful effect, often in a gradual or subtle way.
Pernicious
Present, appearing, or found everywhere.
Ubiquitous
To be restricted or limited to a specific area, group, or activity.
Confined to