This winter the Kei apple produces a out-of-normal crop (usual crops are in late Spring-eraly Summer).
Kei apple (Umkokola) is a native of Africa (like custard apple, cocoa or ca cao --used to make chocolate, coffee,...), but has settled in America, Asia and now Aus. The fruits are very aromatic, sweet when ripe, acid when green. The 3-4 inch long thorns at leaf nodes put umkokola beside kaffir lime (มะกรูด).
Does anyone know its Thai name?