Solanum quitoense

Solanum quitoense, also known as naranjilla 
  (, "little orange") in Ecuador and Panama and as lulo (, from Quechua) in Colombia, is a perennial plant (fruit) found in South America.

It appears to be similar to an orange at first glance, however the inner fruit is quite different, with a ring of blue seeds surrounding a cluster of orange seeds.

 References 

Category:Solanum
Category:Tropical fruit