Identification: What is it?

Hello there,

can anyone here tell us what we have here...? We planted it from a seed like 1,5 years ago, could be some exotic fruit...unfortunately we cannot remember...now we are dying to know...

Many thanks in advance

J&S from Germany

 

Nothing exotic about, either grapefruit or lemon tree. Definately citrus.

 

Interesting leaves. The tree might be a species of Inga. Some possibilities: I. edulis, Ice Cream Bean;
I. feuillei, Pacay.

 

Thank u very much junglekeeper! Seems to be Inga banana or uruguensis...we still wonder where the seed came from, probably picked it up at the botanical garden....
Greetings from Germany

 

Citrus do not have compound leaves with leaflets arranged along a straight rachis.