References

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Celedón-Neghme, C., Gonzalez, W.L. and Gianoli, E. 2006. Cost and benefits of attractive floral traits in the annual species Madia sativa (Asteraceae). Evoluion Ecology 21: 247-257.


Cooper, C. 2010. Class Magnoliopsida. Discover Life in America.                                               <URL: http://www.dlia.org/class-magnoliopsida>.  Accessed 15 March 2014.

Domains and Kingdoms 2004. <URL:http://www.cals.ncsu.edu/course/zo150/mozley/domkingd.html>. Accessed 19 March 2014.                                                                                                        

Encyclopedia Britannica 2014. <URL:http://www.britannica.com/EBchecked/topic/39698/Asteraceae>.  Accessed 17 March 2014.                                                                                                                                                                                                                    

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Ross, T.C. 2012. Plant guide for grassy tarweed (Madia gracilis). USDA-Natural Resources Conservation Service, Plant Materials Center, Corvallis, OR. December 2012.


Sonoma 2013. <URL: http://www.sonoma.edu/preserves/prairie>. Accessed 13 March 2014.

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