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Helenium amarum
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<h2 id="external-links">External links</h2> <ul><li><a href="http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1294,1295">Jepson Manual Treatment</a></li> <li><a href="https://plants.usda.gov/java/profile?symbol=HEAM">United States Department of Agriculture Plants Profile</a></li> <li><a href="http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Helenium+amarum">Calphotos Photo gallery, University of California</a></li> <li><a href="http://www.tropicos.org/ImageFullView.aspx?imageid=100402743">Photo of herbaruim specimen at Missouri Botanical Garden, collected in Mississippi in 2007</a></li> <li><a href="http://www.illinoiswildflowers.info/prairie/plantx/bitterweed.html">Illinois Wildflowers</a></li> <li><a href="https://gobotany.nativeplanttrust.org/species/Helenium/amarum/">Go Botany, New England Wildflower Society</a></li> <li><a href="http://www.discoverlife.org/20/q?search=Helenium+amarum">Discover Life</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Helenium amarum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. <a href="http://bonap.net/MapGallery/County/Helenium%20amarum.png" target="_blank">http://bonap.net/MapGallery/County/Helenium%20amarum.png</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Bierner, Mark W. (2006). "Helenium amarum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. <a href="http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242416623" target="_blank">http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242416623</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"Helenium amarum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. <a href="http://bonap.net/MapGallery/County/Helenium%20amarum.png" target="_blank">http://bonap.net/MapGallery/County/Helenium%20amarum.png</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Turner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100. <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Tropicos, specimen listing for Helenium amarum (Raf.) H. Rock <a href="http://www.tropicos.org/Name/2700849?tab=specimens" target="_blank">http://www.tropicos.org/Name/2700849?tab=specimens</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Queensland Government, Department of Agriculture and Fisheries, Bitter weed (Helenium amarum) <a href="https://www.daf.qld.gov.au/plants/weeds-pest-animals-ants/weeds/a-z-listing-of-weeds/photo-guide-to-weeds/bitter-weed" target="_blank">https://www.daf.qld.gov.au/plants/weeds-pest-animals-ants/weeds/a-z-listing-of-weeds/photo-guide-to-weeds/bitter-weed</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Bierner, Mark W. (2006). "Helenium amarum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. <a href="http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242416623" target="_blank">http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242416623</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Ivie, G. W., et al. (1975). Toxicity and milk bittering properties of tenulin, the major sesquiterpene lactone constituent of Helenium amarum (bitter sneezeweed). J Agric Food Chem 23:5 845-9. <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Arnason, J. T., et al. (1987). Mode of action of the sesquiterpene lactone, tenulin, from Helenium amarum against herbivorous insects. J Nat Prod 50:4 690-5. <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>"Helenium amarum". The Plant List. Royal Botanic Gardens, Kew. Note that this website has been superseded by World Flora Online <a href="http://www.theplantlist.org/tpl1.1/search?q=Helenium+amarum" target="_blank">http://www.theplantlist.org/tpl1.1/search?q=Helenium+amarum</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>Bierner, Mark W. (2006). "Helenium amarum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. <a href="http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242416623" target="_blank">http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242416623</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> </ol>