Small-flowered tonella (Tonella tonella) COSEWIC assessment and status report: chapter 7

Population Sizes and Trends

Four small subpopulations of Tonella tenella were confirmed in 2002 at the Saltspring Island site. These subpopulations, plus an earlier (1976) collection record, occur in a narrow band extending up the mountainside for approximately 425 m. The subpopulations consisted of 30 to 150 plants with areas of 1 to approximately 40 , respectively. Since the plant is inconspicuous and extremely difficult to detect, it is quite likely other subpopulations occur on the slope.

Trends for the existing population of Tonella tenella remains unknown due to a lack of study. In addition, it has not been possible to locate other populations of the species, even though searches have been made by the authors at potential habitats on Saltspring Island as well as on the adjacent mainland of Vancouver Island.

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