Lysimachia thyrsiflora (Tufted Loosestrife)
|Also known as:||Water Loosestrife|
|Habitat:||part shade, sun; bogs, swamps, wet fields|
|Bloom season:||May - July|
|Plant height:||1 to 3 feet|
|Wetland Indicator Status:||GP: OBL MW: OBL NCNE: OBL|
|MN county distribution (click map to enlarge):|
|National distribution (click map to enlarge):|
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Flowers are in round clusters to 1½ inches long on hairy stems that arise from the leaf axils about midway up the plant. Individual flowers are yellow, about 1/3 inch across with 6 narrow petals and 6 long yellow stamens surrounding an orange center. One plant has a few to several flowers. There are no flowers at the top of the plant.
Leaves and stem:
The flowers are unique enough to make this plant pretty easy to identify. All of the Lysimachia species were formerly in the Primulaceae (Primrose) family, but have been moved to the Myrsinaceae (Myrsine) family.
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Photos by K. Chayka taken at Vadnais/Snail Lake Regional Park, Ramsey County. Photos courtesy Peter M. Dziuk taken in Anoka County.
Have you seen this plant in Minnesota, or have any other comments about it?