June 8, 2010
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Southeastern, New Hampshire
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Whorled Yellow Loosestrife is an erect, 1 to 3 foot plant with whorls of 3 to 6 leaves
going up the stem. The leaves lanceolate in shape and are 2 to 4 inches long. As can be
seen in the pictures, the stem is hairy. Also notice that the upper leaves sometimes turn
a purplish color. Each plant has numerous 5-petal yellow flowers marked with red dots at
the center. Whorled Yellow Loosestrife is similar to Garden Yellow Loosestrife
(Lysimachia vulgaris) except that Garden Yellow Loosestrife has many more flowers
that are less delicate. The Garden Yellow Loosestrife flower petals are much wider and
overlap.
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