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Wild flower in the field
Japanese Knotweed is an agressive invasive plant that is difficult to remove.
In summer, the perennial plant Reynoutria grows in nature
This lovely flowering plant featuring bushy white blossoms, are considered by many in the United States and an invasive species and a pest.
Green English ivy (Hedera helix, European ivy) and variegated ivy Hedera helix Goldchild carpet cover the decorative hill In the shadow garden. Nature concept for design. Selective focus
Jasminum Officinale in a tuscan field in Italy.
Green leaves and white flowers of catalpa tree in June
Wild Ginger, Asarum caudatum, Van Damme State Park on the Northern California Coast; Taxonomy Family Aristolochiaceae
White lace cap hydrangea quercifolia in bloom in the summer months
sesame flower
Japanese Knot weed highly invasive plant very difficult to remove
White wood asters (Eurybia divaricata, foreground) and white snakeroot (Ageratina altissima, background) blooming in the Connecticut woods, late summer. The latter is toxic -- a pretty poison that should be removed if growing near livestock. When eaten by cows, the poison contaminates their milk. Milk sickness is thought to be the cause of the death of Abraham Lincoln's mother. Both wildflowers are abundant and visually appealing, and they are important pollinating plants. Bees and butterflies love them.
Pond covered with common water hyacinths, Pontedeiria crassipes which is a invasive plant in Sri Lanka
Waxy clinch perennial plant Reynoutria japonica, green perennial strongly branching perennial can reach a height of up to 3 m
Flowers, plants and trees in Kirstenbosch Botanical Gardens in Cape Town, South Africa,
A perennial ornamental plant with huge leaves.
Japanese Knotweed in Pittsburgh
European Elder or European Black Elderberry, (Sambucus nigra), flowering, Bavaria, Germany
Large depth of focus.
Ipomoea indica flowers. Convolvulaceae perennial tropical vine. Purple flowers bloom from June to November. Because it grows vigorously, it is also used as sunshade for houses in Japan.
Blooming Hedychium ellipticum Hamm ex Sm. (Zingiberaceae) or Ginger Lily flowers in tropical forest.
japanese knotweed flowering, invasive weed ,classified as controlled waste under the Environmental Protection Act 1990, it grows from tiny fragments of rhizomes  the underground network of stems and roots , it spreads easily and can work it's way through  concrete and tarmac , its roots can go down up to 3m deep. Here in the UK the having this weed in your garden can lower the value of your house by several thousands.
The bush has many colorful flowers and lush green leaves.
Knotweed invasive plant
Flowering of the white Hydrangea Paniculata in the city park. Tardiva grade
Small fragrant lilac five-petaled Melia Azedarach flowers and fruits on a tree branch on a Sunny spring day. Flowering of a beautiful tree in natural conditions
Fallopia japonica or Japanese knotweed. Branch with green leaves and white flowers
A clump of  Bistorta amplexicaulis 'Atrosanguinea', aka Persicaria amplexicaulis 'Atrosanguinea', a herbacious perennial in the Polygonaceae family. Its common names include Mountain Fleece, Smartweed and Knotweed.
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