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Jeffrey pine

Pinus jeffreyi

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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Healthy Jeffrey pine
Courtesy, USDA PLANTS Database
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Healthy Jeffrey pine Cone
Courtesy, USDA PLANTS Database


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Healthy Jeffrey pine Tree
Courtesy, USDA PLANTS Database
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Close-up View of Ozone Injury to Jeffrey pine Needles
Courtesy, USDA Ozone Biomonitoring Program


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Ozone Injury to Jeffrey pine Needles
Courtesy, USDA Ozone Biomonitoring Program
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Ozone Injury to Jeffrey pine Needles
Courtesy, USDA Ozone Biomonitoring Program
updated on 09/17/2006  I   http://www.nature.nps.gov/air/Pubs/bioindicators/jeffreyPine.cfm   I  Email: Webmaster