What is this?

Answers

Loki

Looks like Muscadines

plumdumplings: Langsat? Though the stems look wrong https

Langsat? Though the stems look wrong https://www.google.com/search?q=Langsat&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjrwqLQiJfgAhW7FTQIHcntBRIQ_AUIDigB&biw=1430&bih=1010 Do you have those? Can you cut one open? That would certainly help!