Branched bartonia (ssp. paniculata) COSEWIC assessment and status report: chapter 5
Habitat
Habitat requirements
Bartonia paniculata ssp. paniculata occurs in southcentral Ontario in the Georgian Bay Forest Region (Rowe, 1972) and in the Georgian Bay Site Region 5E (Hills, 1959). The habitat is open graminoid or low shrub sphagnum bog or fen with scattered Larch and Black Spruce. The substrate is peat. The site temperature may be colder than normal due to the saturated nature of the peat and the proximity of Georgian Bay.
The following species have been recorded as common associates of Bartonia paniculata ssp. paniculata.
- Aronia melanocarpa (Black Chokeberry)
- Eriophorum virginicum (Virginia Cotton-grass)
- Larix laricina (Larch)
- Nemopanthus mucronatus (Mountain-holly)
- Platanthera blephariglottis (White-fringed Orchid)
- Pogonia ophioglossoides (Rose Pogonia)
- Rhynchospora alba (White Beak-rush)
- Woodwardia virginica (Virginia Chain Fern)
Protection/ownership
Most Bartonia paniculata ssp. paniculata sites are located on private land. The population at site 7 (see Figure 3) is located within a Nature Reserve that is managed by the Ontario Ministry of Natural Resources.