ˌfīsəˈstējēə noun
Etymology: New Latin, from phys- + Greek stegē roof + New Latin -ia; akin to Greek stegein to cover, shelter — more at thatch
1. capitalized : a genus of No. American perennial herbs (family Labiatae) having sessile linear to oblong leaves and showy white, rose, or lavender flowers with an inflated 5-toothed calyx — see false dragonhead
2. -s : any plant of the genus Physostegia