Subgroups with same name

Hi there,

i am trying to mimic my folder structure with the group function - and i discovered it doesnt seem to be possible to add subgroups with same names.

Group1: | Group2:
African plants | Asian plants
Subgroup | Subgroup
Yellow plants | Yellow plants

doesnt work as “yellow plants” can’t be entered as name of subgroup.
Is this somehow possible?
Also i wonder where groups info is stored. Is it somewhere in the entry ? This would be nice to know for exports (sort of a keyword ranking)