I need some help understanding this information from ITIS.
Are these all the same plant, or are there differences between them?

Agastache urticifolia (Benth.) Kuntze – accepted – horsemint giant hyssop, nettleleaf giant hyssop
Agastache urticifolia var. glaucifolia (A. Heller) Cronquist – accepted – nettleleaf giant hyssop
Agastache urticifolia var. urticifolia (Benth.) Kuntze – accepted – nettleleaf giant hyssop

There are differences. The last two are varieties of the first one. Probably subtle differences but different enough to be classified separately.

Thank you Tee.