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Bartonia paniculata ssp. paniculata (Twining screwstem)
Cressler, Alan

Bartonia paniculata ssp. paniculata

Bartonia paniculata (Michx.) Muhl. ssp. paniculata

Twining Screwstem

Gentianaceae (Gentian Family)

Synonym(s): Bartonia lanceolata, Bartonia virginica var. paniculata, Centaurella paniculata


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

Bartonia paniculata ssp. paniculata is found from Ontario and Maine south to east Texas and Florida and is less common in the northern parts of its range, being listed as a species of special concern by Canada's Species at Risk Act for Ontario, by the US as threatened in Maine and Michigan and as endangered in Illinois and New York.


From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb , Vine
Fruit Type: Capsule
Size Notes: Up to about 16 inches tall.

Bloom Information

Bloom Color: White , Pink
Bloom Time: Aug , Sep , Oct


USA: AL , AR , CT , DC , DE , FL , GA , IL , KY , LA , MA , MD , ME , MI , MO , MS , NC , NH , NJ , NY , OK , PA , RI , SC , TN , TX , VA
Canada: NS , ON
Native Habitat: Bog/Fen

Growing Conditions

Soil Moisture: Moist

Web Reference

Webref 57 - Atlas of Florida Plants (2020) Institute for Systematic Botany
Webref 34 - Go Botany (2019) Native Plant Trust
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Bartonia paniculata ssp. paniculata in USDA Plants
FNA: Find Bartonia paniculata ssp. paniculata in the Flora of North America (if available)
Google: Search Google for Bartonia paniculata ssp. paniculata


Record Modified: 2023-04-04
Research By: TWC Staff

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