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Scouler's willow

Salix scouleriana

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 Scouler's willow
Courtesy, Central Washington Native Plants
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Healthy Scouler's willow Leaves
Courtesy, Virginia Tech Forestry Department

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Ozone Injury to Scouler's willow
Courtesy, LWF Ozone Injury Databank
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Ozone Injury to Scouler's willow Leaves
Courtesy, LWF Ozone Injury Databank
updated on 09/17/2006  I   http://nature.nps.gov/air/Pubs/bioindicators/scoulersWillow.cfm   I  Email: Webmaster