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Whorled Loosestrife - Lysimachia quadrifolia


Family: Primulaceae - Primrose family Genus Common Name: Yellow Loosestrife Native Status: NativeDicot Perennial Herb
Lysimachia quadrifolia - Whorled Loosestrife. While the species name for this plant implies that there are four leaves in the whorl, there can be 3 to 6 (some reports even 7.) This specimen found on Big Frog Trail near the trailhead in Polk County, TN has 5 leaves per whorl at the upper nodes, and 6 leaves in the lowest one photographed. The plant is generally 1 to 3 feet tall.

Found in:
AL, CT, DC, DE, GA, IL, IN, KY, MA, MD, ME, MI, MN, NC, NH, NJ, NY, OH, PA, RI, SC, TN, VA, VT, WI, WV

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Lysimachia quadrifolia

Distribution of Lysimachia quadrifolia in the United States and Canada:
USDA Plants Distribution Map temporarily unavailable.
Blue=Native; Grey=Introduced

Map from USDA Plants Database:
USDA, NRCS. 2017. The PLANTS Database (http://plants.usda.gov, 26 May 2017). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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Site: Low Gap Trail, Great Smoky Mountains National Park Date: 2014-June-28Photographer: Gerald C Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro
The yellow flowers have five petals which have a splash of red at their base.
Lysimachia quadrifolia

Site: Big Frog Trail, Polk County, TN Date: 2004-May-30Photographer: Gerald C Williamson
Sony Cybershot
1/30f/3.8 ISO200

6.4mm
The leaves clearly shows why this is "whorled" loosestrife. The flowers are pedicels arising from the axils of the leaves that are in a whorl around the stem. Notice the reddish tint of the top whorl of leaves, indicating a plant that has been receiving significant direct sunlight.
Click on the photo for a larger image
Lysimachia quadrifolia

Site: Pigeon Mountain, Walker County, GA Date: 2009-May-12Photographer: Gerald C Williamson
Nikon D60
1/60f/11 ISO200
Tamron SP 90MM f/2.8 AF Macro
90mm (135 equiv) Flash: Yes
The blossoms (buds in this photo) are on long, thin pedicels that arise from the leaf axils. Sometimes the weight of the blossoms will cause them to drop below the leaf whorl, or they may rest on the leaf, or rise above it. The stem of the plant is smooth to moderately hairy.
Click on the photo for a larger image
Lysimachia quadrifolia

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2017
Photographs Copyright owned by the named photographer