Prepared by Jennifer L. D’Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018.
Scientific name: Lysimachia quadrifolia L.
Common name(s): whorled loosestrife, whorled yellow loosestrife
Images: (to see enlargements [PC]: click on image, then right click and choose “view image”)
-Leaves are simple and whorled up the stem in groups of 4-5
- smoothed edged (entire) and elliptical shaped
-fruits from August to October
-spreads by rhizomes and seeds
– may be confused with L. punctata; see left sidebar of Go Botany webpage
-prefers moist soils
-adapts to drier soils
-full to part sun
North Carolina State Extension (2020). “Lysimachia Quadrifolia.” (Whorled Loosestrife) | North Carolina Extension Gardener Plant Toolbox, plants.ces.ncsu.edu/plants/lysimachia-quadrifolia/.