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American sycamore

Platanus occidentalis

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).


photograph
Healthy American sycamore Leaf
Courtesy, Virginia Tech Forestry Department


photograph
American sycamore Tree
Courtesy, Dr. Donald D. Davis, Penn State University
updated on 09/17/2006  I   http://nature.nps.gov/air/Pubs/bioindicators/americanSycamore.cfm   I  Email: Webmaster