I typed into google "Lista de Especie da Flora do Brazil 2012" (I had tried 2013 through 2015 but I think 2012 may be the newest version available);
the space for Group was already filled in as Angiosperms;
the space for Family was already filled in as 'all;
in the space for Genus I typed: Pseudogynoxys
in the space for Species I typed: chenopodioides
...then hit 'search' and the plant is there.
The link to the results page was so long I did not add it to my earlier message...click on this to find the page for Pseudogynoxys chenopodioides:
http://floradobrasil.jbrj.gov....
