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Claire Peterson

Unknown grass / possible aquatic plant?

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Hi all,

I received an e-mail from someone in the Kalamazoo area today regarding some glass like plants growing at their church along the river bank in the rocks. Wondering if anyone can tell what this could be and whether or not it is / can become a problem. She said the roots are like a fat rubber band.

UpdateIt started growing on the north side of one building and has now jumped over to another area, probably 50-75 yards away.  She keeps trying to kill it with Spectracide and some weed killer the church has but "it won’t quit!"



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Native!  This is horsetail (Equisetum), probably field horsetail (E. arvense).  No worries about it being invasive, but it's definitely aggressive--and controlling it is pretty darn difficult, as it doesn't respond to most herbicides and grows like crazy.  They're likely better off figuring out how to garden WITH it than against it.

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