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The plant looks very similar to Queen Anne's Lace. You can see in the attached photos how the plant has marched across well into my ceanothus hedge from the fence line 20 feet away. As I stated above, it already strangled two of them which I had to replace last summer. The entire area is now covered with black plastic until I can figure out a way to get rid of this plant. I have had to resort to the most potent pesticides I can find, unfortunately. Every landscaper or garden center that I have talked to tells me they get complaints all the time from people who planted this thinking it was "pretty". If garden centers in Oregon are selling this, they need to be banned from doing so. I think you will find no shortage of claims on the attached links of how evil this plant is, and what a pervasive problem it has now become in many parts of the country, including the Pacific NW.