Help with identifying this rapidly growing plant

I would be very grateful in identifying this plant. This is planted a few years ago by our neighbour and it is spreading into our garden. It appears as if the root is spreading underground and new shoots growing up from the ground around. They said it is some kind of lemon brought from a garden centre.

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  • figratfigrat Posts: 1,619
    Well I can say for sure it's not a lemon as I know it. Perhaps you might consider googling 'persicaria?'
  • nutcutletnutcutlet Posts: 24,237

    Does it do anything else? Flower? fruit? I wouldn't expect lemons

  • Figrat, persicaria is a good suggestion. Vietnamese Coriander Persicaria odorata is sometimes known as lemon myrtle. It is also called Polygonum odoratum. It has inconspicuous pale yellow to white flowers and a slightly lemony smell. However, it does have brown marks on the leaves, which I can't see in the photo. 

  • nutcutletnutcutlet Posts: 24,237

    I've been looking at some images and all the persicarias seem to have alternate leaves This has opposite leaves. 

  • ThaiGerThaiGer Posts: 165

    it is not a persicaria odorata, because have no red stalk (stem). The asian persicaria we eat at salat or cooking in vegetable soup. I'll looking also for the correct kind, have no idea at the moment...

  • ThaiGerThaiGer Posts: 165

    I think it's persicaria orientalis like this.

  • joabjoab Posts: 5

    Thanks very  much. I have never seen it with flowers, and I could not find any seeds when I checked today. It is a acts like a climber and it grows around and tries to completely cover a other shrubs around. I am posting one more photo with the arrow pointing toward the stems; thicker older stems and new green branches.

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  • nutcutletnutcutlet Posts: 24,237

    Isn't Persicaria orientalis an annual? This doesn't look like an annual.

  • ThaiGerThaiGer Posts: 165

    Yes, but I thing, the thick "wooden" stem stand for some years. Any gardener save seeds for growing in the next year and another say, that P.o. is a self sowing plant, they love the "tree-like" plant. And everybody have own opinion or experience. Greeting, ThaiGer. Look HERE.

  • Dont think I can help.. sorry

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