What kind of plant is this? Wenzhou Zeya mountain plant, locals pick the whole plant to make herbal tea, the leaves are very bitter

Patchouli, scientific name: Agastache rugosa (Fisch. et Mey.) O. Ktze.; also known as: Hopscotch, pale sue, mountain fennel, etc., belongs to the order of labiatae, Labiatae perennial herbaceous plants, stems erect, 0.5 ~ 1.5m high, 4-angled, up to 7 ~ 8mm thick, leaf cordate-ovate to oblong lanceolate, the corolla light purplish-blue, about 8mm long, mature Nutlets ovate-oblong, ca. 1.8mm long, ca. 1.1mm wide, flowering from June to September, fruiting from September to November.