Orchid number when tracking collection?

[AKNicolle]

I have a request to add an orchid number field to my Orchid Album app, but I'm not exactly sure what they mean. I presume they mean some form of identifier, but that's really the intent of the Name field.

Is an orchid number some sort of official terminology? They were a newer collector, but seemed absolutely appalled at the omission. Unfortunately I can't email them for clarification, since they just left a review.

Any ideas?