Identifying ice cream bean species.

[BonsaiBeast]

I was planning on purchasing a 15 gallon tree but the seller isn't aware of the species.

Any suggestions?

[Jungle Yard]

Identification is difficult among Inga genus. It requires you to have in your possession flowers, leaves with all their morphological structures and know what the fruit looks like.

Here is a link to identification key for Inga https://www.kew.org/science/tropamerica/neotropikey/families/keys/inga/index.htm
You have to figure out how to get the right plug-in, so you can use the key.