Quantitative and qualitative studies have been made on mature pine forests of selected areas on Minnesota Point and Wisconsin Point in the Duluth-Superior Harbor area. The forests were sampled by the point quarters method. The leading dominant in the Minnesota forest was Pinus resinosa, while the leading dominant in the Wisconsin forest was Pinus strobus. Trees up to 173 years of age were found on Minnesota Point, while the maximum age of the trees sampled on Wisconsin Point was 142 years. A total of 87 species of vascular plants were identified in the two areas.
Davidson, D. W.,
Bernard, J. B.
Mature Pine Forests in Duluth Harbor Area.
Journal of the Minnesota Academy of Science, Vol. 35 No.2, 118-121.
Retrieved from https://digitalcommons.morris.umn.edu/jmas/vol35/iss2/17