The pollen grains of 34 populations, representing 16 species of Consolida (DC.) Gray, have been examined by LM and SEM. The polar axis (P), equatorial diameter (E), P/E ratio and exine patterns were measured. The pollen grains were found out to be 3-zonocolpate, euprolate to subprolate. The shortest polar axis to belong to C. tehranica (Boiss.) Rech.f. and the longest to belong to C. trigonello...