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Date: 2009-07-22 11:46:14 Physical geography Polygonaceae Flora of China Flora of Japan Japanese knotweed Cascades Polygonum Ivy Cascade Range Botany Invasive plant species West Coast of the United States		We are the National Park Service Add to Reading List Source URL: nature.nps.gov Download Document from Source Website File Size: 1,68 MB Share Document on Facebook

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