Branched bartonia (ssp. paniculata) COSEWIC assessment and status report: chapter 1
COSEWIC Assessment Summary
Assessment Summary – November 2003
Common name: Branched bartonia
Scientific name: Bartonia paniculata ssp. paniculata
Status: Threatened
Reason for designation: A cryptic wetland annual species of Atlantic Coastal Plain affinity, highly restricted both geographically and ecologically and present at only six of seven documented sites. Ontario populations are disjunct by about 600 km from the main range of the species with little potential for a rescue effect. The greatest potential risk is from the invasive shrub, glossy buckthorn, at two localities.
Occurrence: Ontario
Status history: Designated Special Concern in April 1992.
Status re-examined: Uplisted to Threatened in November 2003. Last assessment based on an update status report.
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