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Mystery plant

wildlife, gardening, environment, Rural living, Pets and Vets
cinelli
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Mystery plant

#243737

Postby cinelli » August 12th, 2019, 12:41 pm

Is anyone able to identify this mystery plant which has sprung up in my garden, please?

Image

It has a single stem 2 inches across. It is already 5 feet high, 4 feet across and the largest leaves are 8 inches across.
It has made all this growth in about 2 months. I had hoped it would flower, making identification easier, but so far it is all leaves.

In particular, should I be worried about it? I know it is not Japanese knot weed but could it be something similar?

Thanks.

Cinelli

Itsallaguess
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Re: Mystery plant

#243741

Postby Itsallaguess » August 12th, 2019, 12:52 pm

cinelli wrote:
Is anyone able to identify this mystery plant which has sprung up in my garden, please?

It has a single stem 2 inches across. It is already 5 feet high, 4 feet across and the largest leaves are 8 inches across.

It has made all this growth in about 2 months.


Wow, that's some growth-spurt!

Is it a type of giant rhubarb?

Giant rhubarb (Gunnera manicata) - https://www.puddleplants.co.uk/product/ ... -manicata/

Gunnera Manicata: how to recognize the real one - http://palmvrienden.net/gblapalmeraie/2 ... -real-one/

Cheers,

Itsallaguess

Howyoudoin
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Re: Mystery plant

#243744

Postby Howyoudoin » August 12th, 2019, 1:01 pm

cinelli wrote:Is anyone able to identify this mystery plant which has sprung up in my garden, please?

Image

It has a single stem 2 inches across. It is already 5 feet high, 4 feet across and the largest leaves are 8 inches across.
It has made all this growth in about 2 months. I had hoped it would flower, making identification easier, but so far it is all leaves.

In particular, should I be worried about it? I know it is not Japanese knot weed but could it be something similar?

Thanks.

Cinelli



Do you live near the coast? The leaves and growth spurt could well be this*: http://architecturalplants.com/plants/id/malva-arborea

HYD

* According to my PlantFinder app

Howyoudoin
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Re: Mystery plant

#243749

Postby Howyoudoin » August 12th, 2019, 1:33 pm

Howyoudoin wrote:
cinelli wrote:Is anyone able to identify this mystery plant which has sprung up in my garden, please?

Image

It has a single stem 2 inches across. It is already 5 feet high, 4 feet across and the largest leaves are 8 inches across.
It has made all this growth in about 2 months. I had hoped it would flower, making identification easier, but so far it is all leaves.

In particular, should I be worried about it? I know it is not Japanese knot weed but could it be something similar?

Thanks.

Cinelli



Do you live near the coast? The leaves and growth spurt could well be this*: http://architecturalplants.com/plants/id/malva-arborea

HYD

* According to my PlantFinder app


Further to my previous post, here is a better photo of the Malva Arborea's leaves, which do look similar:

Image

HYD

bungeejumper
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Re: Mystery plant

#243757

Postby bungeejumper » August 12th, 2019, 1:53 pm

The leaves look vaguely figgy to me, and the very rapid growth rate would also fit. But a stem two inches thick within two months? Yikes!

I wouldn't give it house room until I knew exactly what it was. Sounds invasive. You've read Day of the Triffids, of course?

BTW, fig plants exude white sticky sap if you cut them, and it can burn and irritate your skin if you don't wash it off promptly. Does that ring any bells?

BJ

UncleIan
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Re: Mystery plant

#243819

Postby UncleIan » August 12th, 2019, 5:02 pm

Hmm, kind of looks like the leaves of a wild strain of Lavatera, or Mallow (common name). This can grow from zero to 5-6ft+ in the right conditions, is often a single stem, and it looks like the start of a bit of rust on the leaves, which isn't uncommon. That said, mine have been flowering for a month or so, and have nearly finished, so why this one would be so far behind I don't know, maybe it's just in its first season so is a bit behind.

Also hollyhocks can do that massive single stem thing, but again, down south at least they've been flowering and finished more or less by now, and I've not seen leaves that colour on a hollyhock.

Those leaves do look familiar.

Oooh, oooh, Lavatera maritima?

Google "lavatera maritima leaf" looks close anyway.

PinkDalek
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Re: Mystery plant

#243826

Postby PinkDalek » August 12th, 2019, 5:27 pm

UncleIan wrote:Hmm, kind of looks like the leaves of a wild strain of Lavatera, or Mallow (common name).


HYD's earlier reply also suggested a type of mallow. An image of the stem would assist.

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Re: Mystery plant

#243857

Postby Sorcery » August 12th, 2019, 8:10 pm

The plant reminds me of a wild cabbage that arrived unexpectedly in my garden in the wasteland created by digging out a swimming pond. Mine was over 1.5m tall and was possibly a Jersey Cabbage see : https://en.wikipedia.org/wiki/Brassica_oleracea
If it is that, it's biennial so perhaps flowers next year.

Didn't see too much of the leaves as they were fairly quickly infested with cabbage white caterpillars.
It ended up leafless but still managed to seed. It was 5-6 years ago so my memory is imperfect.

cinelli
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Re: Mystery plant

#243865

Postby cinelli » August 12th, 2019, 9:16 pm

Many thanks for the suggestions. I don't think it's a fig because Wikipedia pictures show shiny leaves. My plant has matt green leaves, more like a cabbage. Also I had to cut it back because otherwise I couldn't drive the car in. It didn't bleed guey sap. And I don't think it is a giant rhubarb as those leaves are huge. So I think it could be a tree mallow. I live in the Midlands so anything which grows only on the coast is out. Here are two more photos:
Image

Image
The second one shows the stem is more like 2 1/2 inches across rather than my earlier estimate. But if it is a mallow, what a pity it hasn't flowered yet. That would confirm it one way or the other. If a tree mallow is biennial, does that mean I have to leave it all winter just the check what the flowers look like next year? This could be a risk if it has triffid-like tendencies.

Cinelli

AsleepInYorkshire
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Re: Mystery plant

#243869

Postby AsleepInYorkshire » August 12th, 2019, 9:42 pm

It's the biggest aspidistra in the world :ugeek:

AiY (My bad :oops: )

bungeejumper
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Re: Mystery plant

#243934

Postby bungeejumper » August 13th, 2019, 9:34 am

Hmmm, I'm coming round to HYD's view that it might be a tree mallow. Leaves can be soft and wrinkly as well as shiny, and they come in many shapes. But it's renowned for its woody stem and its phenomenal growth rate.
Image
Considered to be an invasive pest. It's killing puffins in Scotland! https://www.abdn.ac.uk/news/3870/

BJ

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Re: Mystery plant

#244446

Postby Gengulphus » August 15th, 2019, 10:27 am

cinelli wrote:Is anyone able to identify this mystery plant which has sprung up in my garden, please?

Image

I'm afraid I can't, but I will point out that your photographs show the leaves as having 9 clear veins radiating out from the stalk attachment point. If one can find a clear enough photo of the leaves of a candidate plant, that may rule it out. For instance, itsallaguess's suggestion of giant rhubarb (Gunnera manicata) looks wrong to me, on the basis that his link http://palmvrienden.net/gblapalmeraie/2 ... -real-one/ has a photo some way down very clearly showing that its leaves have 5 such veins.

Gengulphus

cinelli
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Re: Mystery plant

#245181

Postby cinelli » August 18th, 2019, 10:30 am

Thanks, Gengulphus. One thing I did try, unsuccessfully as it turned out, was Google Image. This came to my attention only recently when XFool used it as a method to find mystery items on the puzzles board. I uploaded my leaf image and asked for matches. But the only returns were generic leaf photos. I just wish the thing would flower. I am quite looking forward to those pretty purple blooms, or possibly something else.

Cinelli

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Re: Mystery plant

#245190

Postby madhatter » August 18th, 2019, 11:12 am

You could try the free (and ad free) PlantNet app. It allows you to select more than one photo before submitting them and even allows photos to be offered as leaves, flowers, fruits, bark etc.


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