pentstemon

noun

pent·​ste·​mon

less common spelling of penstemon

: any of a genus (Penstemon) of perennial, chiefly North American herbs or low shrubs of the plantain family typically with spikes of showy, two-lipped, tubular flowers with two lobes on the upper lip and three lobes on the lower lip : beardtongue

In the pastel planting, pink penstemons with upright spikes of tubular flowers contrast with such mounding plants as pinks …

—Lynn Ocone