Branched bartonia (ssp. paniculata) COSEWIC assessment and status report: chapter 6

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Biology

General

Bartonia paniculata ssp. paniculata populations generally occur as clumps of plants. Occasionally a few plants might be scattered over a wide area. These popula­tions are quite local as can be seen from Figure 3. Branched bartonia is an annual, possibly heterotrophic species (relying on other organisms for its nutrients), reproducing only by seed. It is not known how large the seed bank might be or what conditions are necessary for germination.

Population sizes for Ontario branched bartonia are not known with certainty because detailed searches have not been conducted at most known sites and because the plant is very easily overlooked and sometimes occurs in rather extensive bogs.