My interests are far ranging and include flowering plant systematics and evolution, North American floristics, and biodiversity informatics. My more recent systematic research focuses on Viburnum (Adoxaceae) and the mangosteens (the genus Garcinia, Clusiaceae). I am interested in the North American flora and I have conducted survey and inventory work in the eastern and central United States. I am also heavily involved in several herbarium digitization projects, including the New England Vascular Plants and Lichen/Bryophyte TCNs, among others.
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