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Smith, R.W.

Lysimachia thyrsiflora

Lysimachia thyrsiflora L.

Tufted Loosestrife

Primulaceae (Primrose Family)

Synonym(s): Naumburgia thyrsiflora

USDA Symbol: LYTH2

USDA Native Status: L48 (N), AK (N), CAN (N)

Erect stems with evenly distributed leaves and yellow flowers in dense slender racemes in leaf axils near midstem; entire plant finely dotted with black or dark purple.

This plant also occurs in Eurasia. The tight racemes of yellow flowers immediately distinguish this species, with the erect stamens giving the racemes a fuzzy appearance.

From the Image Gallery

6 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Breeding System: Flowers Bisexual
Fruit Type: Capsule
Size Notes: Up to about 32 inches tall.
Leaf: Green

Bloom Information

Bloom Color: Yellow
Bloom Time: Mar , Apr , May , Jun , Jul , Aug

Distribution

USA: AK , CA , CO , CT , IA , ID , IL , IN , KS , MA , MD , ME , MI , MN , MO , MT , ND , NE , NH , NJ , NY , OH , OR , PA , RI , SD , UT , VT , WA , WI , WV , WY
Canada: AB , BC , MB , NB , NL , NS , NT , ON , PE , QC , SK , YT
Native Distribution: Much of North America south to northern California, northern Colorado, northern Missouri, West Virginia, and Maryland.
Native Habitat: Swamps, lakes, and ditches.

Growing Conditions

Water Use: High
Light Requirement: Part Shade
CaCO3 Tolerance: Low

Benefit

Conspicuous Flowers: yes

Value to Beneficial Insects

Special Value to Native Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:	OBL	OBL	OBL		OBL	OBL		OBL	OBL	OBL

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Lysimachia thyrsiflora in USDA Plants
FNA: Find Lysimachia thyrsiflora in the Flora of North America (if available)
Google: Search Google for Lysimachia thyrsiflora

Metadata

Record Modified: 2023-05-03
Research By: TWC Staff

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