The radially symmetrical flowers have 5 sepals and 5 petals. The 5 stamens are opposite the petals rather than between them, an unusual arrangement in flowers with 5 petals. The flowers are usually flat, but in the genus Dodecatheon the petals are sweptback and the stamens are united in a beak. The simple leaves are often whorled but may be opposite or basal.

Flower This family contains flowers.

Loosestrife, Fringed Lysimachea ciliata
Loosestrife, Whorled Lysimachea quadrifolia
Loosestrife, yellow Lysimachia terrestris
Moneywort Lysimachia nummularia
Starflower Trientalis borealis
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