Trans-Pecos giant hyssop (Agastache breviflora)
Same genus
- Blue giant hyssop (Agastache foeniculum)
- Agastache mexicana
- Korean mint (Agastache rugosa)
- Mosquito plant (Agastache cana)
- Cusick's giant hyssop (Agastache cusickii)
- San Luis Mountain giant hyssop (Agastache mearnsii)
- Smallleaf giant hyssop (Agastache parvifolia)
- Bill Williams Mountain giant hyssop (Agastache pallidiflora)