Japanese honeysuckle sends out similar numbers of aboveground runners that root where they touch the ground.
Each rhizome or runner generates buds that grow above ground and search for a new support to climb upon.
When pulled up, they fragment and each fragment produces several new shoots.
Thus, these species are extremely difficult to eradicate.
Barberry (Berberis vulgaris)is a thorny shrub that grows rapidly and densely.
The lack of light and fallen leaves beneath the bush produces a dead zone there.
Multiflora rose (Rosa multiflora)is another thorny shrub that grows rapidly and densely.
Like the other species listed here, underground rhizomes help the plants to spread rather rapidly.
Once the parent is removed, it quickly sends up volunteers from the roots.
These have to be removed over the course of a year or two.
The greatest dispersal of this species is by birds.
The berries of this native North American plant form a substantial summer and early autumn component of birds diets.
Though many birds and small mammals eat these, many escape to germinate.
Their roots are composed of a mass of tough fibers spreading from the bottom of the stem.
When pulled up, these roots break and, like most other invasives, produce new buds.
Fibrous rootstocks make this weed difficult to pull up.
Numerous seeds are preyed on by small birds and mammals, while spiny leaves and branches.
The leaves are toxic to horses.
All pose problems to native plants and (often) animals, and control becomes nearly impossible.
Often these plants are dispersed by birds that depend on their fruit for nutrition.
Thus, eradicating well-entrenched species may harm wildlife if native species are not consequently reestablished.
