What is the Damage of Them Coming to New Hampshire?
You will easily spot large clumps of these purple or reddish flowers growing next to steams, lakes, and in marshes, wet meadows, and roadside ditches in the late summer. Look closely at the picture at the bottom of the page and you will notice the flower spikes, and you will see that they are made up of whorls of many flowers, each with six crumpled petals. The leaves are lance-shaped and grow in the opposite pairs.
An "invasive plant" is usually defined as a non-native species whose introduction causes or is likely to cause economic or environ mental harm or harm to human.
