Solved SOLVED Is this a Weed?

Is this a Weed please?



It has little prickly things at the leaf stem axils.

Thank you.

 

Almost looks conker like, Aesculus species of some kind maybe but the prickly bits tend to say no to that idea.
Can we have pictures from other angles please.
Did it make all that growth this year?

 

I will get more pics tomorrow. It grew like that within two weeks. We had then pulled up a tomato plant that big which suddenly appeared. These were in the large pot the giant three Mandevillas are in.

 

PS Meant to say my PlantNet app does not recognise it.

 

Looks a bit like Sweet Chestnut, but the leaf edges aren't right.

 

Its a palmate leaf.

 

Thought that was a newt.

 

Castanea sativa...common name sweet chestnut are not like mystery plant...see below


castanea sativa leaves - Recherche Google

 

Aesculus 'Glabra' perhaps?

 

Is it one plant or a cluster of seedlings.

 

Morning. One plant about a foot tall. Many leaf stalks with the prickly thing in the axis. It has a root ball not a nut. There are little leaves at the base of the big ones.

I am not up yet but will get more photos later ... it was pulled up so hope it is good to photo.

 

Ah ha. Could it be a Cleome? I planted some seeds at the base of the Schinus molle Pepper Tree which was in that pot earlier this year. The entire root ball came up but the pot was not cleaned out.

 

These are the seeds I bought and this says a spine under the leaves.

Cleome hassleriana 'Rose Queen' (Spider Flower)

 

Well done.
You have solved your own mystery.
Sorted.

cleome leaves - Recherche Google

 

No, thank you, Ss. Now I shall go out and find a sunny spot to plant it. You may think that strange here but I have large Jacaranda, Melaleuca, Callistemon and Viburnum shading most everything.