Gucker, Corey L.; Shaw Nancy L. 2020. Nettleleaf giant hyssop (Agastache urticifolia). In: Gucker, C.L. ; Shaw, N.L., eds. Western forbs: Biology, ecology, and use in restoration. Reno, NV: Great Basin Fire Science Exchange. Online: https://westernforbs.org/species/nettleleaf-giant-hyssop-agastache-urticifolia/