Help ID this plant with balloon-like feature containing seeds
I searched Google for Lantern plant and came across this http://tabibito.hopto.org/display_one_file.php?article=494 



Which is the same plant, but not the best of references, it doesn't give a scientific name and I am not sure Paper lantern plant is their right identification.

It is definitely of the genus Physalis 

https://en.wikipedia.org/wiki/Physalis 

but as yet haven't been able to find the species that matches your leaf exactly. But I'd thought I'd post for now as it may help you, or others.