Japanese Knotweed Research Paper

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Japanese Knotweed is a bamboo-like plant. It tends to grow in large clusters and can spread rather quickly. This plant is not native to the United States, and sadly, it is beginning to take over. These simple leaves are arrowhead or spade-like in shape. They grow in an alternate pattern. The edges contain no teeth, meaning they are entire. Compared to other plants in the area, the leaves are quite large, usually growing 6 inches long and and 5 inches wide (“Japanese Knotweed”). There is a red ring along the stem where the leaf attaches. The stem itself is hard and has a woody feel to it. It is green in color and looks botched with a white coating. This coating tends to rub off rather easily. When broken, you may notice that this plant’s stem …show more content…

They grow in clustered spikes near the tip of the plants’ stems. The flowers contain 5 petals. These flowers are pollinated by insects. The seeds have 3 wings and are less than an inch in length. They are usually dark and glossy in appearance (“Japanese Knotweed”). Japanese Knotweed can grow seemingly anywhere. It can tolerate a wide variety of moisture conditions and soil. However, the plant prefers to grow in full sun, rather than growing in a shady area. Possible habitats for this plant include roadsides, along riverbanks, wetlands, and forest edges. It is able to spread so rapidly because if a shoot is broken off, it can move down a stream and root in a new location. This could be a reason why this plant grows popularly along our Chadakoin River (“Stone”). Japanese Knotweed was not always here. It was introduced to the United States in the late 1800’s from Asia. It was introduced as an ornamental plant. This plant causes a loss of local biodiversity in the areas where it grows. It crowds out many local plants growing along the ground by taking their needed nutrients and water. Because of their tallness and the size of their leaves, there is little sun penetrating the ground where they grow. This further creates problems for understory plants, as well as newly germinating plants, such as saplings. One study sectioned in south-central New York found that there were not any native plants 33 feet inside the Knotweed

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