Scientific Name: Bartonia paniculata ssp. paniculata
Other/Previous Names: Bartonia paniculata
Taxonomy Group: Vascular Plants
Last COSEWIC Assessment: November 2003
Last COSEWIC Designation: Threatened
SARA Status: Schedule 1, Threatened
Image of Branched Bartonia
Branched Bartonia is an annual herb, 10 to 40 cm tall, with a green or purple, angled and sometimes twinning stem. It usually grows nestled deep among sphagnum moss, where it appears shorter in height and is difficult to distinguish. Leaves are small, alternating, and scale-like. Flowers are white, with four lobes, and grow on upward-facing branches. The tiny Branched Bartonia capsules taper to a blunt tip; averaging 4.2 mm in length, each capsule contains 1000 to 1500 seeds. Photosynthesis may be limited because this plant’s leaves are so small; therefore, it is likely that Branched Bartonia depends upon soil fungi for much of its organic nutrients.
Distribution and Population
Branched Bartonia is widely distributed in the eastern United States, from New England south to Louisiana and Texas. In Canada, it is known from only six confirmed sites in South Central Ontario, in the Muskoka and Parry Sound districts. Population sizes are not known with certainty, but they are estimated to range from 500 to 1000 individuals.
Branched Bartonia occurs in open graminoid (grass-like vegetation) or low shrub sphagnum bog or fen habitat. It is usually found growing on a peat substrate, and is associated with Larch and Black Spruce.
Branched Bartonia generally grows in clumps, but occasionally a few plants are found scattered over a wide area. It reproduces from seed annually, and is thought to be heterotrophic (relying on other organisms to obtain its nutrients). The conditions needed for seed germination are unknown.
The peripheral areas of two sites where Branched Bartonia is found are being taken over by Black Buckthorn, an invasive shrub. Continued expansion of this shrub could threaten Branched Bartonia at these sites.
Federal ProtectionThe Branched Bartonia is protected under the federal Species at Risk Act (SARA). More information about SARA, including how it protects individual species, is available in the Species at Risk Act: A Guide.
Provincial and Territorial Protection
Status of Recovery Planning
Recovery Strategies :
Name Recovery Strategy for the Branched Bartonia (Bartonia paniculata ssp. paniculata) in Canada
Status First posting on SAR registry
Recovery Progress and Activities
Summary of Progress to Date In 2003, a total of 213 plants were found distributed throughout seven different locations in southern Ontario. There is uncertainty in the total number of plants present because detailed searches have not been conducted at most known sites and due to the fact that the plant is very easily overlooked. In 2005, 530 flowering/fruiting stems were found, which is a 67% increase over the results of the 2002 survey, but not all sites were surveyed in 2002. Summary of Research/Monitoring Activities In 2005, Ontario Parks, Central Zone and the Parry Sound MNR District hired a consultant to inventory all Branched Bartonia populations in Ontario. All 7 known sites were surveyed and plants were found at all of them. There is now complete information on the current status of all known populations. URLs COSEWIC Assessment and Update Status Report on the Branched Bartonia:http://www.sararegistry.gc.ca/virtual_sara/files/cosewic/sr_branched_bartonia_e.pdf Ontario’s Biodiversity: Species at Risk:http://www.rom.on.ca/ontario/risk.php?doc_type=fact&lang=&id=29 Canada’s Species at Risk:http://www.canadianbiodiversity.mcgill.ca/english/species/endangered/endangeredpages/bar_pan.htm
PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.
9 record(s) found.
- COSEWIC Status Reports (1 record(s) found.)
- COSEWIC Assessments (1 record(s) found.)
- Response Statements (1 record(s) found.)
- Recovery Strategies (1 record(s) found.)
- Orders (2 record(s) found.)
- COSEWIC Annual Reports (1 record(s) found.)
- Consultation Documents (1 record(s) found.)
- Recovery Document Posting Plans (1 record(s) found.)
COSEWIC Status Reports
COSEWIC Annual Reports
COSEWIC Annual Report - 2004 (2004)2004 Annual Report to the Canadian Endangered Species Conservation Council (CESCC) from the Committee on the Status of Endangered Wildlife in Canada.
Recovery Document Posting Plans
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