How to simply search for a hostgroup and all its nested groups

Hi, folks,

 This seems so obvious, but it's not:

 I want to select everything in a hostgroup. I thought hostgroup = "RHEL 7" (the name of the group) would do the trick, but the three servers in a subgroup don't get selected. Is there a simple way to do this? Or do I have to AND it? That's not such an issue for me, but if you have many sub-groups...

Thanks,

 John A