Flower:

Spike-like raceme 6 inches or longer of ½ to ¾-inch yellow flowers with reddish lines down the center of each petal. At the base of each petal are red dots that surround the 5 long protruding stamens, which are also streaked yellow and red. One plant may have multiple clusters, at the top of the plant and arising from upper leaf axils.

Leaves and stems:

Leaves are up to 4 inches long ¾ inch wide, toothless and hairless, tapering to a point at each end with no leaf stalk, oppositely attached. The leaf surface is covered in tiny dots. Stems are smooth and green.

Late in the season reddish bulblets, resembling caterpillars, can form in the leaf axils. These are what's been described as “suppressed branchlets” and may be mistaken for fruit.

Notes:

All of the Lysimachia species were formerly in the Primulaceae (Primrose) family, but have been moved to the Myrsinaceae (Myrsine) family.