Family: Lythraceae (Loosestrife Family) or some sources list it as Primulaceae (Primrose Family) Genus: Lysimachia | Species: terrestris Description: Also called Swamp candles. The erect stem bears a terminal, spike-like cluster of 1/2″ yellow flowers with two red spots at the base of each petal. Spreads rapidly by underground stems. This weed can cause moderate