A stumper of a fruit?

This fruit is smooth skinned and the taste (don't know if it's mature) is bland. It's about 1.5 inches in diameter, and has a flowering end similar to a loquat. Any ideas?

 

I believe it is a Persimmon.

 

Because of the smooth skin, persimmon was also my thought. But the seeds don't match any varieties I know of.

 

What does the rest of the plant look like?

 

Could this be the fruit?

http://davesgarden.com/guides/pf/showimage/20034/

 

Could it be a Poma Rosa (Szygium jambos)? Although your identification of a bland flavour makes me doubt this; Poma Rosa taste very strongly of roses.

 

Why not a Loquat Eriobotrya japonica? The seed looks about right too.

Definitely not a persimmon, they don't have that persistent calyx at the fruit apex.

 

Size threw me for a second, but the really happy loquats are about that big here....