Bartonia paniculata - (Michx.) Muhl.
Twining Screwstem
Other Common Names: twining screwstem
Taxonomic Status: Accepted
Related ITIS Name(s): Bartonia paniculata (Michx.) Muhl. (TSN 30020)
Unique Identifier: ELEMENT_GLOBAL.2.147579
Element Code: PDGEN01010
Informal Taxonomy: Plants, Vascular - Flowering Plants - Gentian Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Gentianales Gentianaceae Bartonia
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Bartonia paniculata
Taxonomic Comments: Kartesz (1999) recognizes two subspecies of Bartonia paniculata, both occurring in Canada: ssp. iodandra and ssp. paniculata. The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) assigned vulnerable status to the species B. paniculata (in 1992), without mentioning subspecies, but they describe its range in Canada as limited to Ontario (on the COSEWIC website as of June 6, 2000). Since Kartesz (1999) has records for B. paniculata ssp. iodandra in New Brunswick, Newfoundland (Island), and Nova Scotia, it appears that COSEWIC does not include ssp. iodandra in B. paniculata.
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 25Aug2016
Global Status Last Changed: 14Feb1984
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Nation: United States
National Status: NNR
Nation: Canada
National Status: N4N5 (25Oct2017)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Alabama (SNR), Arkansas (SNR), Connecticut (SNR), Delaware (S2), District of Columbia (S1), Florida (SNR), Georgia (S3S4), Illinois (S1), Indiana (S3), Kentucky (S4), Louisiana (SU), Maine (S1), Maryland (S3), Massachusetts (SNR), Michigan (S2), Mississippi (SNR), Missouri (SNR), New Hampshire (SNR), New Jersey (SNR), New York (S1), North Carolina (S2), Ohio (S1), Oklahoma (S1), Pennsylvania (S3), Rhode Island (SNR), South Carolina (SNR), Tennessee (SNR), Texas (SNR), Virginia (S3), Wisconsin (S1)
Canada New Brunswick (S2S3), Newfoundland Island (S3S4), Nova Scotia (S4S5), Ontario (S2)

Other Statuses

Implied Status under the Committee on the Status of Endangered Wildlife in Canada (COSEWIC):PS:T
Comments on COSEWIC: Subspecies paniculata is designated Threatened.

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

Distribution
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U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AL, AR, CT, DC, DE, FL, GA, IL, IN, KY, LA, MA, MD, ME, MI, MO, MS, NC, NH, NJ, NY, OH, OK, PA, RI, SC, TN, TX, VA, WI
Canada NB, NF, NS, ON

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
DE Kent (10001), New Castle (10003)*, Sussex (10005)
IL Pope (17151)
IN Ripley (18137)
ME Cumberland (23005), Hancock (23009)*, Knox (23013), Sagadahoc (23023), York (23031)
MI Allegan (26005), Chippewa (26033), Luce (26095), Van Buren (26159)
MO Carter (29035), Stoddard (29207)
NH Carroll (33003)*, Strafford (33017), Sullivan (33019)
NY Orange (36071), Suffolk (36103), Westchester (36119)
OH Brown (39015), Clermont (39025), Clinton (39027)
OK Atoka (40005), Choctaw (40023), McCurtain (40089), Pushmataha (40127)
PA Adams (42001), Berks (42011), Bucks (42017), Cameron (42023), Carbon (42025), Chester (42029), Clearfield (42033), Clinton (42035), Cumberland (42041), Dauphin (42043), Juniata (42067), Lancaster (42071)*, Lebanon (42075), Lehigh (42077)*, Luzerne (42079), Mifflin (42087), Montgomery (42091)*, Northumberland (42097), Schuylkill (42107), Sullivan (42113), Tioga (42117), Wyoming (42131)
WI Jackson (55053), Marinette (55075), Monroe (55081)
WV Berkeley (54003)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Lower Androscoggin (01040002)+, Maine Coastal (01050002)+, Presumpscot (01060001)+, Saco (01060002)+*, Piscataqua-Salmon Falls (01060003)+, Merrimack (01070006)+, West (01080107)+
02 Hudson-Wappinger (02020008)+, Bronx (02030102)+, Southern Long Island (02030202)+, Lehigh (02040106)+, Crosswicks-Neshaminy (02040201)+, Lower Delaware (02040202)+*, Schuylkill (02040203)+, Brandywine-Christina (02040205)+, Broadkill-Smyrna (02040207)+, Chincoteague (02040303)+, Upper Susquehanna-Tunkhannock (02050106)+, Upper Susquehanna-Lackawanna (02050107)+, Upper West Branch Susquehanna (02050201)+, Sinnemahoning (02050202)+, Middle West Branch Susquehanna (02050203)+, Pine (02050205)+, Lower West Branch Susquehanna (02050206)+, Lower Susquehanna-Penns (02050301)+, Lower Juniata (02050304)+, Lower Susquehanna-Swatara (02050305)+, Lower Susquehanna (02050306)+*, Chester-Sassafras (02060002)+, Conococheague-Opequon (02070004)+, Western Lower Delmarva (02080109)+
04 Betsy-Chocolay (04020201)+, Tahquamenon (04020202)+, Peshtigo (04030105)+, St. Joseph (04050001)+, Black-Macatawa (04050002)+, Kalamazoo (04050003)+
05 Little Miami (05090202)+, Middle Ohio-Laughery (05090203)+, Lower Ohio-Bay (05140203)+
07 Black (07040007)+, Castle Rock (07070003)+
08 Little River Ditches (08020204)+
11 Upper Black (11010007)+, Muddy Boggy (11140103)+, Kiamichi (11140105)+, Pecan-Waterhole (11140106)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History Not yet assessed
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Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Pringle, J. S. 2016. Gentianaceae, the Gentian Family. R.F.C. Naczi, J. R. Abbott, and Collaborators, New Manual of Vascular Plants of Northeastern United States and Adjacent Canada, online edition of 2016. NYBG Press, New York. 23 pp.


  • Argus, G.W., K.M. Pryer, D.J. White and C.J. Keddy (eds.). 1982-1987. Atlas of the Rare Vascular Plants of Ontario.. Botany Division, National Museum of National Sciences, Ottawa.

  • Bowles, M.L., et al. 1991. Rarely seen endangered plants, rediscoveries, and species new to Illinois. Erigenia 11:27-51.

  • Brinker, S. 2006. Detailed Inventory of Branched Bartonia Bartonia paniculata (Michx.) Muhlenb ssp. paniculata in Central Ontario. Prepared for Ontario Ministry of Natural Resources and Ontario Parks. 29 pp + appendices.

  • Brunton, D.F. 1991, Draft. Life Science Areas of Natural and Scientific Interest in Site District 5-7 - A Review and Assessment of Significant Natural Areas in Site District 5-7. Prepared for OMNR, Parks and Recreation Areas Section, Huntsville. 112 pp. + appendices.

  • Brunton, D.F. 1993. Life Science Areas of Natural and Scientific Interest in Site District 5E-7: A Review and Assessment of Significant Natural Areas in Site District 5E-7. Ontario Ministry of Natural Resources, Science and Technology Section, Huntsville, Ontario. 166 pp. + map.

  • COSEWIC. 2003a. COSEWIC assessment and update status report on the Branched Bartonia Bartonia paniculata ssp. paniculata in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. vi + 14 pp.

  • Ciotir, C., C. Yesson, and J. Freeland. 2013. The evolutionary history and conservation value of disjunct Bartonia paniculata subsp. paniculata (Branched Bartonia) populations in Canada. Botany 91: 605-613.

  • Fernald, M.L. 1950. Gray's manual of botany. 8th edition. D. Van Nostrand, New York. 1632 pp.

  • Gillett, J.M. 1959. A revision of Bartonia and Obolaria (Gentianaceae). Rhodora 61(722):43-62.

  • Gillett, J.M. 1963. The Gentians of Canada, Alaska and Greenland. Publication 1180, Research Branch, Canada Department of Agriculture, Ottawa, Ontario. 99 pp.

  • Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

  • Henson, D. 1985. Bartonia paniculata, new to Michigan. Michigan Botanist 24:19-20.

  • Hill SR. 2003. Conservation Assessment for Twining Screwstem (Bartonia paniculata (Michx.) Muhl.) USDA Forest Service, Eastern Region (http://www.fs.fed.us/r9/wildlife/tes/ca-overview/docs/plant_Bartonia_paniculata-Twining_Screwstem.pdf).

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Mathews KG, Dunne N, York E, Struwe L. 2009. A phylogenetic analysis and taxonomic revision of Bartonia (Gentianaceae: Gentianeae), based on molecular and morphological evidence. Systematic Botany. 34: 162-172.

  • Mitchell, Richard S. 1986. A checklist of New York State plants. Bulletin No. 458. New York State Museum. 272 pp.

  • Moye, William S. 2006. Highly Ranked Plants of the South Mountain Region. Unpublished notes sent via email to Misty Franklin in February 2006.

  • North-South Environmental Inc. 2008. Branched Bartonia (Bartonia paniculata (Michx.) Muhlenb,. ssp. paniculata) Assessment and Monitoring Program at O'Donnell Point Provincial Nature Reserve. Prepared for Ontario Parks, Central Zone. 24 pp + appendices.

  • Reschke, Carol. 1990. Ecological communities of New York State. New York Natural Heritage Program, New York State Department of Environmental Conservation. Latham, NY. 96 pp. plus xi.

  • Reznicek, A.A. and R.E. Whiting. 1976. Bartonia (Gentianaceae) in Ontario. Canadian Field-Naturalist 90: 67-69.

  • Schwegman, J.E. 1968. New plant records from southern Illinois. Trans. Ill. State Acad. Sci. 61:313-314.

  • White, D.J. 1992. Status Report on the Branched Bartonia, Bartonia paniculata (Michx.) Muhl. ssp. paniculata, in Canada. Committee on the Status of Endangered Wildlife in Canada (COSEWIC), Canadian Wildlife Service, Ottawa, Ontario. 18 pp.

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