Holiss...
Here in Venezuela, we have that species that grows freely in the fields. Many times it grew in my house and I removed it thinking it was a weed.
You say that it can be eaten. How do you prepare it?
Do you use it before it opens and takes out its seeds?
We cut and then fry the green one using cooking oil and adding salt to it...the seeds within get too crispy as well...there are other dishes as well....but I think..Google would be the best answer for it.😉