Mango in Richmond !?

There are 2 of this kind of small trees in Garden City Park
in Richmond. Bipinnate leaves and fruits about 3 inches
at present. Mango, a tropical fruit, is a wild guess.

 

Walnut, but not the ones we eat.

 

Ha ha, no wonder nobody pick them.
Thanks Wendy.

 

The nuts of the Asian walnut species, of which this appears to be an example are perfectly edible. (Compare also with butternut (Juglans cinerea)).

 

Good news !!

 

So you're saying this is Juglans ailantifolia(?). A search on "Asian walnut" brings up J. mandshurica.
I meant these aren't the walnuts we see for sale in stores.

 

Thanks all for the effort to ID.

 

So you're saying...?

species was used in plural, as in

The (more than one) Asian walnut species

 

Superior modern article on walnuts and their identification:

http://www.dendrology.org/publications/tree-profiles/notes-on-the-temperate-species-of-juglans/