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White snakeroot

Eupatorium rugosum

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 White snakeroot Flower
Courtesy, Wisconsin State Herbarium
photograph
Healthy White snakeroot Plant
Courtesy, Wisconsin State Herbarium

photograph
Healthy White snakeroot Flowers
Courtesy, Wisconsin State Herbarium
updated on 09/17/2006  I   http://www.nature.nps.gov/air/Pubs/bioindicators/whiteSnakeroot.cfm   I  Email: Webmaster