Taxonomic revision of the broad-margined calyx species of Scrophularia (Scrophulariaceae) in Iran, with one new species

The species of Scrophularia L. (Scrophulariaceae) with broad-margined calyx are taxonomically revised. The studied group includes S. haematantha Boiss. & Heldr., S. kollakii S.A. Ahmad, S. mesopotamica Boiss., S. pruinosa Boiss., S. rosulata Stiefelh., S. sanguinea Grau, S. sulaimanica S.A. Ahmad and S. valida Grau, all of them characterized by having a farinaceous indumentum, a broad-margined calyx and a gland-dotted staminode. One new species from Iran belonging to this group is here described, i.e., S. sardashtensis Ranjbar & Rahch. Scrophularia kollakii and S. sulaimanica are also recorded in Iran for the first time. Macro and micro-morphological characters of this species are examined and compared with the related taxa. Detailed descriptions and distribution maps are provided for the nine species treated. Additionally, the names S. haematantha, S. pruinosa and S. rosulata are lectotypified.