Sideritis L.
Genus composed of about 190 species, distributed mainly in the Mediterranean countries. In North Africa it is represented by 20 species, with greater diversity in the N of Morocco. Although there are some annual herbaceous species, most are perennial and subshrubs up to 0.7(1) m in height. Most of them are woody only at the base of the stems. Here we will only treat 3 representative species S. arborescens, S. briquetiana and S. incana. Further information and dichotomous keys to identify all these species can be found in the section References – Basic references. As a monograph of the genus the following:
Obon de Castro, C. & Rivera, D. 1994. A taxonomic revision of the section Sideritis (genus Sideritis) (Labiatae). Phanerogamarum monographiae, 21. Cramer. Berlín & Stuttgart. 650 pp.
Updated by: B. Valdés & J. Charco.