American elder

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).

Flowering American elder Courtesy, Dan Tenaglia, missouriplants.com

Close-up View of American elder Flower Courtesy, Dan Tenaglia, missouriplants.com

American elder Fruit, Courtesy Dan Tenaglia, missouriplants.com

Ozone Injury to American elder Leaf Courtesy, Dr. Donald D. Davis, Penn State University