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American hazelnut

Corylus americana

Ozone injury usually appears as black or purple spots (stipple), yellow or white bleached spots (chlorotic mottle, needle tip burn), or leaf browning (necrosis). Ozone may also cause premature leaf drop (senescence).


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Close-up View of American hazelnut Flowers
Courtesy, University of Connecticut

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American hazelnut Leaves
Courtesy, Wisconsin State Herbarium Vascular Plant Species Database
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American hazelnut Leaf
Courtesy, University of Connecticut

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American hazelnut Branch with Ozone Injury
Courtesy, University of Connecticut

updated on 09/16/2006  I   http://www.nature.nps.gov/air/Pubs/bioindicators/americanHazelnut.cfm   I  Email: Webmaster