A couple of months ago I repotted a small succulent, and this little thing shot up beside it. I repotted it to see what would become of it and this is how it looks currently. (I should have included something for scale, but the pot is 10cm diameter.)
I'm sure it's just a weed of some sort that got mixed in with the soil I used, but I can't match it to anything in the garden. I was hoping someone here could identify it and would appreciate any help in doing so!