News about Doreen
Doreen Hansen co-wrote a paper appearing in Michigan Botanist, December 2007, Vol. 46, pp. 80-86, entitled “Noteworthy Collections.� She worked with two people at UMD, Dr. David Schimpf, Associate Professor of Biology, and Deborah Pomroy, Assistant Scientist, after finding and identifying a new invasive plant in Duluth called “Sedum Aizoon.� Evidently this plant escaped cultivation and is spreading in the Piedmont Heights area, in both wooded areas and in lawns. It had only been recorded in Massachusetts and in a few parts of Canada prior to this discovery. GPS measurements were taken and specimens have been added to the Olga Lakela Herbarium here at UMD.