Can anyone tell me what this is please?

I'm still unsure what it is, I did think morning glory but from what nigel said its thrown me off again

 

Cucumber?

 

No not like any cucumber I've grown

 

It looks like a climber of some kind.
Where did you get the seed from? We need some help?
I dont think its morning glory now, it looks very different.

The leaves do look a bit like sweet potato though.

 

I volunteer for the local community food planters, I was given some seed packets for around the planters to pretty them up. One of the packets was wildflower mix but was already opened and only contained 1 seed. So I don't know if someone had put it in there lol

 

The seed looked somewhat like these

 

It flowered

 

Is the big leaf at the front part of the same plant?

 

Yes

 

I think we need a picture of the whole plant again, nice to see it flower.
The word weed keeps coming into my head for some reason.

 

Buckwheat!

The seeds are similar and the flowers are a perfect match, the leaves in these googled photos are a bit more pointed but the texture and the relative size look about right.

Google pics:

 

Thanks, I think you may have got it!