Invasives
Hedera helix, or English Ivy, is a very
invasive vine in both the West and
East coasts of the United States as
well as in the South. As shown in this
photo, the vine not only creeps along
the ground to smother all other plants,
but will also climb any object that gets
in its way; including 200 foot trees that
the vine will pull down to the ground
due to the vine's massive water
weight.
This plant spread from cultivated
areas into naturalized ones via
vegetative growth and bird dispersal.
invasive vine in both the West and
East coasts of the United States as
well as in the South. As shown in this
photo, the vine not only creeps along
the ground to smother all other plants,
but will also climb any object that gets
in its way; including 200 foot trees that
the vine will pull down to the ground
due to the vine's massive water
weight.
This plant spread from cultivated
areas into naturalized ones via
vegetative growth and bird dispersal.
Ilex aquifolium, or English Holly, was an
ornamental evergreen that escaped
gardens through bird dispersal. It is a
problem throughout the West coast of
the United States as well as Hawaii.
The plant grows in dense layers that
suppress the germination of native
shrubs and forbs. Native wildlife is also
negatively impacted by this shrub as it
blocks pathways and takes away
habitats.
ornamental evergreen that escaped
gardens through bird dispersal. It is a
problem throughout the West coast of
the United States as well as Hawaii.
The plant grows in dense layers that
suppress the germination of native
shrubs and forbs. Native wildlife is also
negatively impacted by this shrub as it
blocks pathways and takes away
habitats.
Clematis vitalba, or Traveler's Joy, is a
woody vine that is found to be invasive
in the Western states of America as well
as a few Eastern ones.
As shown in the picture, the vine climbs
on other native trees and shrubs
causing a dense canopy which
smothers all light from reaching the
plants below. The weight of the vine will
eventually cause the collapse of the
native plant and open the area for other
noxious and invasive plants to take hold.
woody vine that is found to be invasive
in the Western states of America as well
as a few Eastern ones.
As shown in the picture, the vine climbs
on other native trees and shrubs
causing a dense canopy which
smothers all light from reaching the
plants below. The weight of the vine will
eventually cause the collapse of the
native plant and open the area for other
noxious and invasive plants to take hold.
Prunus laurocerasus, or English Laurel,
is a shrub that is used as a
landscaping hedge. It has escaped
into naturalized habitats throughout the
West coast of the United States where
it out competes native flora. Laurel
grows in a wide range of soils and light
levels enabling it to dominate an area
in a short time. This plant provides little
habitat refuge for wildlife and keeps
native plants from germinating.
is a shrub that is used as a
landscaping hedge. It has escaped
into naturalized habitats throughout the
West coast of the United States where
it out competes native flora. Laurel
grows in a wide range of soils and light
levels enabling it to dominate an area
in a short time. This plant provides little
habitat refuge for wildlife and keeps
native plants from germinating.
Vinca major, or periwinkle, is a quick
spreading ground cover mainly used as an
ornamental in gardens. It has escaped
cultivation and moved into native forested
habitats where it out competes native
vegetation by smothering herbaceous
plants and keeping tree and shrub
seedlings from germinating.
This species is considered invasive
throughout the Western, Eastern and
Southern states of America.
spreading ground cover mainly used as an
ornamental in gardens. It has escaped
cultivation and moved into native forested
habitats where it out competes native
vegetation by smothering herbaceous
plants and keeping tree and shrub
seedlings from germinating.
This species is considered invasive
throughout the Western, Eastern and
Southern states of America.
Polygonum cuspidatum, or Japanese
Knotweed, was introduced from Asia as an
ornamental and as a species for erosion
control. It quickly escaped cultivation and
has become invasive throughout the
Western and Eastern coasts as well as
scattered throughout the Midwestern United
States. Japanese Knotweed spreads
quickly and crowds out native plant species
to take over and dominate a site.
Knotweed, was introduced from Asia as an
ornamental and as a species for erosion
control. It quickly escaped cultivation and
has become invasive throughout the
Western and Eastern coasts as well as
scattered throughout the Midwestern United
States. Japanese Knotweed spreads
quickly and crowds out native plant species
to take over and dominate a site.
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