http://www.uwgb.edu/biodiversity/herbarium/trees/pruvir01.htm
Prunus virginiana (chokecherry)
http://www.uwgb.edu/BIODIVERSITY/herbarium/trees/prupen01.htm
Prunus pensylvanica (pin cherry)
http://www.uwgb.edu/BIODIVERSITY/herbarium/trees/ostvir01.htm
Ostrya virginiana (ironwood)
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