Rose·bay n. Bot. (a) the oleander. [Obs.] (b) Any shrub of the genus Rhododendron. [U.S.] (c) An herb (Epilobium spicatum) with showy purple flowers, common in Europe and North America; -- called also great willow herb.
Wil·low-herb n. Bot. A perennial herb (Epilobium spicatum) with narrow willowlike leaves and showy rose-purple flowers. The name is sometimes made to include other species of the same genus.
Spiked willow-herb, a perennial herb (Lythrum Salicaria) with willowy leaves and spiked purplish flowers.
Fire·weed n. Bot. (a) An American plant (Erechthites hiercifolia), very troublesome in spots where brushwood has been burned. (b) The great willow-herb (Epilobium spicatum).