This study seeks to answer the following questions: (1) What is the current status of the Collinsonia verticillatapopulations in Ohio? (2) What site and vegetation characteristics are typical of the Ohio habitat of Collinsonia verticillata? Previously known populations were ground-checked to determine current population status. Plots were established within selected populations in order to record vegetation and environmental data.
The Ohio populations of Collinsonia verticillataare stable, and four new sites were discovered over the course of the study. The habitat sites are on steep north to northeast-facing lower slopes on silt-loam soils with low pH. Associated tree species are white oak, sugar maple, and red maple. Viburnum dentatummay be an associated indicator species. Possible threats to the populations include invasive species, logging, and soil disturbance. Frequent monitoring and removal of invasive plants are needed. Location of additional populations in the future is likely.