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Revision as of 23:12, 8 January 2025
| Bartonia paniculata | |
|---|---|
| |
| Conservation status | |
 Secure (NatureServe) | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Gentianales |
| Family: | Gentianaceae |
| Genus: | Bartonia |
| Species: | B. paniculata |
| Binomial name | |
| Bartonia paniculata (Michx.) Muhl. | |
| Subspecies | |
| |
Bartonia paniculata, commonly known as Twining screwstem, is a saprophytic, annual or biennial species that grows in acidic, sandy-peaty wetlands.
Distribution
Bartonia paniculata is the northernmost-ranging species in the Bartonia species. It is found along the Atlantic coastal plain; its widespread range crosses 29 American states and 5 Canadian provinces, and overlaps with that of Bartonia virginica. The subspecies texana is found in eastern Texas and northeastern Louisiana; it was previously identified as Bartonia texana.
Conservation
Twining screwstem is legally protected in the state of Michigan as a threatened species.
Populations of the subspecies texana have declined by 50% over the past 57 years. It is found within the baygalls of the coastal plain forests of southeastern Texas. As the baygalls have become rarer as a plant community, the texana subpopulation has also declined.
References
- ^ "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 2025-01-08.
- ^ "Bartonia paniculata (Michx.) Muhl. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2025-01-08.
- ^ Mathews, Katherine G.; Dunne, Niall; York, Emily; Struwe, Lena (2009-03-01). "A Phylogenetic Analysis and Taxonomic Revision of Bartonia (Gentianaceae: Gentianeae), Based on Molecular and Morphological Evidence". Systematic Botany. 34 (1): 162–172. doi:10.1600/036364409787602320. ISSN 0363-6445.
- Hill, Steven (28 January 2003). "Conservation assessment for twining screwstem (Bartonia paniculata (Michx.) Muhl.)". Center for Biodiversity Technical Report 2003. 7.
- "Bartonia paniculata (Panicled screwstem) - Michigan Natural Features Inventory". mnfi.anr.msu.edu. Retrieved 2025-01-08.
- ^ Chahal, Sharandeep S. (December 2023). Ecology of rare North American plant species Bartonia paniculata subsp. texana and Platanthera cooperi (Thesis). Texas Tech University. Retrieved 8 January 2025.
| Taxon identifiers | |
|---|---|
| Bartonia paniculata |
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