A large shrub-like herb it forms dense thickets which out compete native species for space, light and nutrients.
(it; forms; dense thickets which out compete native species for space, light and nutrients) (dense thickets; out compete; native species for space, light and nutrients)
it dense thickets
forms out compete
dense thickets which out compete native species for space, light and nutrients
native species for space, light and nutrients