Lysimachia quadrifolia

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Lysimachia quadrifolia
Lysimachia quadrifolia 4319.JPG

Secure (NatureServe)
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Primulaceae
Genus: Lysimachia
L. quadrifolia
Binomial name
Lysimachia quadrifolia

Lysimachia quadrifolia, the whorled loosestrife,[1] whorled yellow loosestrife,[2] or crosswort,[3] is a species of herbaceous plant in the family Primulaceae. It native to the eastern United States and Canada.


Lysimachia quadrifolia grows to a maximum height of about 1 metre (3.3 ft). The long roots are shallow, sometimes spreading along the surface of the ground. It usually has simple, unbranched stems. The leaves are spotted and hairy on the undersides. They are borne in whorls of 3 to 7 around the stem. The flowers grow on long stalks from the leaf whorls. The five-parted flower is yellow with a reddish center[4] and sometimes reddish margins, and streaked with dark resin canals.[5]



  1. ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  2. ^ "Lysimachia quadrifolia". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 27 January 2016. CS1 maint: discouraged parameter (link)
  3. ^ Lysimachia quadrifolia. ITIS.
  4. ^ Lysimachia quadrifolia. Freckmann Herbarium. University of Wisconsin, Stevens Point.
  5. ^ Lysimachia quadrifolia. Flora of North America.

External links[edit]

Media related to Lysimachia quadrifolia at Wikimedia Commons