These will get taller but they are flowering well now. Every back will flower like this and new flowers open at the middle. Pollen and seeds are borne on the line filament looking structures.
Always looking for interesting plants for pollinators and food! Bonus points for highly, and pleasantly scented plants.
"Si hortum in bibliotheca habes, nihil deerit." [“If you have a garden and a library, you have everything you need.”] -- Marcus Tullius Cicero in Ad Familiares IX, 4, to Varro. 46 BCE