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This undated image shows toxic moonseed fruit. Care should be taken not to mistake them for blueberries. (Starr Environmental/Bugwood.org via AP)

This undated image shows toxic moonseed fruit. Care should be taken not to mistake them for blueberries. (Starr Environmental/Bugwood.org via AP)

This undated image provided by Bugwood.org shows toxic Jerusalem cherry fruits, which closely resemble cherry tomatoes. (Charles T. Bryson/USDA Agricultural Research Service/Bugwood.org via AP)

This undated image provided by Bugwood.org shows toxic Jerusalem cherry fruits, which closely resemble cherry tomatoes. (Charles T. Bryson/USDA Agricultural Research Service/Bugwood.org via AP)

This undated image provided by Bugwood.org shows toxic horsenettle fruits, which closely resemble cherry tomatoes. (Joseph M. DiTomaso/University of California - Davis/Bugwood.org)

This undated image provided by Bugwood.org shows toxic horsenettle fruits, which closely resemble cherry tomatoes. (Joseph M. DiTomaso/University of California - Davis/Bugwood.org)

FILE - An employee touches the flower of a Datura Stramonium plant, part of the nightshade family, at The Royal Botanic Gardens in London, Monday, Sept. 22, 2014. (AP Photo/Kirsty Wigglesworth, File)

FILE - An employee touches the flower of a Datura Stramonium plant, part of the nightshade family, at The Royal Botanic Gardens in London, Monday, Sept. 22, 2014. (AP Photo/Kirsty Wigglesworth, File)