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Aggressive weed

Posted by wendyb 5A/MA (My Page) on
Thu, Jun 7, 12 at 8:31

This weed with the narrow elliptical leaf popped into my woodland garden last year with a vengeance and I had never seen it before that (been here 20 years). I worked on it somewhat last year with round-up but not diligently. I sacrificed a patch of bunchberry that it was gobbling up. I don't believe it ever flowered.

It is back this year stronger than ever. One remaining bunchberry flower can be seen on the upper left corner.

It pulls out fairly easy but not every bit of root comes out because I hear roots rip. I fear it is one of those plants that grows back from any lingering root remains. Which means more roundup.

The area gets morning sun, good soil.

Would love to know what it is before I annihilate it!


Follow-Up Postings:

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RE: Aggressive weed

They look like Evening Primrose, Oenothera seedlings to me.


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RE: Aggressive weed

Right after I posted that I remembered that there is another kind of Oenothera, Sundrops, that is just awfully agressive. I planted it back when I first moved in here 15 years ago and let it go for a couple of years before I realized what a thug it was. It took 3-4 years to get rid of, but it's gone now. I would try to dig out as much of the root system as possible and spot treat anything that came up after that. And move your bunchberry to a new location, poor thing. Good luck!


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RE: Aggressive weed

Funny, I remember trying to establish Oenothera in my perennial garden many years ago and it didn't like it here. I think it was the pink one.

Wonder how this thug got here. The area is relatively undisturbed. Oh some roadside trees got removed a couple of years ago. I wonder if some new sun contributed.


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RE: Aggressive weed

  • Posted by remy 6WNY (My Page) on
    Thu, Jun 7, 12 at 9:55

They are not Oenothera fruticosa seedlings. O. Fruticosa has a tight clump rosette type basal foliage pattern, and this looks like it does not. They could be another kind of Oenothera since I've not grown others and can not say, but they actually look like Epilobium seedlings to me which also show up with a vengeance.
Remy


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RE: Aggressive weed

Googled Epilobium foliage and that looks it has a whorled upright habit. This thug of mine seems like a groundcover.

Googling oenethera doesn't get me a good hit either but could be because there are so many species. I didn't look at all of them closely. One phrase that caught my eye though was "nearly stemless". I think that matches mine.


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