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Published on Aug 14, 2012
Endangered 16 of the 20 states where it still appears, the small-whorled pogonia has earned the title "rarest orchid east of the Mississippi."To save it, Smithsonian ecologists must delve into life underground.
View more Ecosystems on the Edge videos and learn how you can help at http://ecosystems.serc.si.edu. Created by the Smithsonian Environmental Research Center.