A taxonomic revision of Scutellaria L. sect. Lupulinaria subsect. Lupulinaria (Lamiaceae) for Iran is presented. The present study is based on morphological characters of the specimens from the authors’ expeditions and other herbarium collections. A new species is described and one subspecies is elevated to the species rank. In addition, Scutellaria chorassanica Bunge is treated as a distinct species. With this treatment the number of species in subsect. Lupulinaria in the country is increased to 25 taxa (21 species and 4 subspecies) enumerated here. Lectotypes are also designated for S. araxensis, S. litwinowii, S. luteocaerulea, S. mianensis, S. persica, S. theobromina and S. tomentosa. Finally, a key to all species of the section is provided.
