Are you talking about group in tree view?

Try to group by any field, then by another field, and you'll have some kind of 'hierachy'?

I do not recall of anything else that could be named a hierarchical tree view, even in odoo 8?

Hi,

I am not sure whether you are looking for this,  you can create a hierarchical tree view like this

For more have a look at this module: https://www.odoo.com/apps/modules/10.0/company_hierarchy/

This is v10, hope the same can be done in v11 too .

If you are not looking for this please neglect it.

Thanks