Nigh on impossible - peanut (or ground nut), member of the legume family, or a sweet pea? Difficult. Where is it growing and did you plant it?

It's seems to have popped up all on its own. I was tending to my plant box that has parsley and basil well established growing in it. An I saw this had broken through the soil an gently wiggled it an removed it knowing it shouldn't be there. I do live in an area with a lot of birds and gathered it must be a seed dropped by one flying over. It's root was quiet thick(parsnip shaped) an milky in colour with what I can only discribe as cashew nut shaped bulbs growing from it that were also milky in colour. Curly leaf parsley and basil were the only thing I've ever grown in this soil or plant box and I'm completely dumb founded as to what it is. It looks like nothing growing in or around my garden.

I would have been tempted to replant it in its own pot and see what happens.

That's exactly what I have done! It's so odd. But I still might not know what it is when grown. I've discovered this evening when I went outside the leaves fold in half an close in the evening. Curiosity is killing me. I would love to know what it is.

Then I think it is a peanut from a bird feeder.

Cammomile
I have to say Thankyou because after much research and staring intently at leaf shapes colours an veins it would appear that indeed it may well be a peanut plant. That's a first for me! I will have to look into there care as I have never kept one before. For something near impossible I'm impressed you appear to have been spot on with your identification, an this novice gardener is very pleased and grateful :)

I admit to not being an expert too. It just rang a bell somewhere. Perhaps I tried to grow one as a child!

I tried to grow one once too. It did flower but it didn't make any peanuts. But it was very surprising to find out that the "nut"is actually found under the soil - the flower stem curls down and buries the seed rather like cyclamen do. Who would have thought it...

That's why they are called ground nuts in the USA :o)

They also pop up around our garden. Squirrels take them from birdfeeders and bury them (to dig up later, to eat), but sometimes they sprout first......

I would say it's a peanut planted by a squirrel or something, I had one coming up so I have put it in a flower pot, I grow one years ago, if I remember rightly it has a yellow flower,
Now to make you laugh......

"My Dream"

I had a dream about the plant..... It had grown quite large in the greenhouse boarder so started to dig it up and found it had produced a load of 'Peanut Butter' in the ground LOL, what a Daft Dream LOL

Now if you had made a note of how to grow peanut butter ready made you'd have your fortune in the bag LadyE! Keep a notebook by the bed in future.

SBG - yes, well, I realised that afterwards...

LOL Steragram :o))