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Dracocephalum
See list of 3 species in this genus-
1a. Corolla (15–) 20–25 (–30) mm long, the basal, connate portion distinctly exserted from the calyx; each node of the inflorescence with 4–6 (–10) flowers
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1b. Corolla 7–15 mm long, the basal, connate portion not or only slightly exserted from the calyx; each node of the inflorescence with 6–12 flowers
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2a. Floral bracts spinose-serrate; lower stem leaves with blades 25–80 mm long; calyx 6–8 mm long
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2b. Floral bracts entire or ciliate; lower stem leaves with blades 10–35 mm long; calyx 10 mm long or longer
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Each photo represents one species in this genus.