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Spread of toxic invasive plant alarms U.S. forest authorities

Source
Washington Post

Publication Date
2013-06-13

Named after the Roman hero Hercules, Heracleum mantegazzianum captures attention with its impressive foliage: huge, sharply lobed leaves; hollow, hairy, purple-splotched stems, four inches in diameter; and towering umbrella-shaped white flowers that bloom in late spring.

Content
http://www.japantimes.co.jp/news/2013/06/13/world/spread-of-toxic-invasive-plant-alarms-u-s-forest-authorities/#.UbnD-77D-Uk