Slender collomia (Collomia tenella) COSEWIC assessment and status report: chapter 7
Population Sizes and Trends
The single population of Collomia tenella consisted of 127 plants over 56 m² in 2003. It was discovered in 1997 in the Similkameen River valley, west of Princeton, British Columbia (Figure 3). When it was found in 1997, there were 10 plants, and in 2000, this population consisted of a single plant. The authors and Frank Lomer surveyed the site in 2002 and failed to locate any plants. The plants reappeared in 2003 when environmental conditions were apparently more favourable. Since the habitat for this species in British Columbia is extremely limited it is not likely that many more sites will be found.
Short- and long-term trends for these populations are unknown but can be expected to vary markedly due to differences in yearly seed germination and seedling success. Conditions on the sandy ridge may or may not be ideal from year to year based on normal climatic fluctuations.