Lysimachia quadrifolia
Encyclopedia
Lysimachia quadrifolia (Whorled Loosestrife) is a herbaceous plant
Herbaceous plant
A herbaceous plant is a plant that has leaves and stems that die down at the end of the growing season to the soil level. They have no persistent woody stem above ground...

 in the Myrsinaceae
Myrsinaceae
Myrsinaceae, or the Myrsine family, is a rather large family from the order Ericales. It consists of 35 genera and about 1000 species....

 family. It has simple leaves
Leaf
A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....

in whorls of 3-7 (but usually 4), and erect stems. It grows to a height of about one meter. The flowers have five pointed, yellow petals with a splash of red near the center.

It is native to the eastern United States and Canada.
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