Science Press & Missouri Botanical Garden Press, Beijing & St. Louis. 
 4. Forzza, R C. & et al. 2010. 2010 Lista de espécies Flora do Brasil https://web.archive.org/web/20150906080403/http://floradobrasil.jbrj.gov.br/2010/
 5. Funk V. A., P. E. Berry, S. lexander, T. . Hollwell & C. L. Kellff. 2007. Checklist of the Plants of the Guiana Shield (Venezuela: Amazonas, Blivar, Deta Amacuro; Guyana, Surinam, French Guiana). Cntr. U.S. Nat Herb. 55: 1–584. 
 6. Hokhe, O., P. E. Bery & O. Huber. 2008. Nev. Cat. F. Vas. Venezuela 1–860. Fundación Instituto Botánico de Venezuela, Caracas, Venezuela. 

 Enlaces externos. 
 - http://www.wildflower.org/plats/result.php?id_plant=sasad
 - http://www.semicol.com.co/index.php?pageshop.product_details&flypage=flypage_new.tpl&product_id=4&category_id=2&option=com_virtuemart&Itemid=27
 - http://www.ars-rin.gov/cgi-bin/npgs/html/taxon.pl?3090
Science Press & Missouri Botanical Garden Press, Beijing & St. Louis. 
 4. Forzza, R. C. & et al. 2010. 2010 Lista de espécies Flora do Brasil. https://web.archive.org/web/20150906080403/http://floradobrasil.jbrj.gov.br/2010/.
 5. Funk, V. A., P. E. Berry, S. Alexander, T. H. Hollowell & C. L. Kelloff. 2007. Checklist of the Plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana). Contr. U.S. Natl. Herb. 55: 1–584. 
 6. Hokche, O., P. E. Berry & O. Huber. 2008. Nuev. Cat. Fl. Vas. Venezuela 1–860. Fundación Instituto Botánico de Venezuela, Caracas, Venezuela. 

 Enlaces externos. 
 - http://www.wildflower.org/plants/result.php?id_plant=sasad
 - http://www.semicol.com.co/index.php?page=shop.product_details&flypage=flypage_new.tpl&product_id=41&category_id=2&option=com_virtuemart&Itemid=27
 - http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?33090
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