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Sorbus aucuparia (European Mountain-ash), bark, twig, bud, lateralSeptember 14 2010
Hedborn Jr., Edward A.
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Corylus americana (American Hazelnut), bark, twigJune 5 2010
Hedborn Jr., Edward A.
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Aristolochia tomentosa (Wooly Dutchman's Pipe), bark, twigSeptember 15 2010
Hedborn Jr., Edward A.
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Alnus glutinosa (L.) Gaertn. (European black alder), twigs with leaves, catkins, and fruit2005 – 2012
Hagstrom, John