Thank you so much for your help! i found out that my link was giving me a version from 2013!
it does give Pseudogynoxys now of which two of them in the South-East, not in the Rio de Janeiro State, but we were not far from the neighbouring Sao Paulo State. Borders are never very strict, for plants..
Pseudogynoxys chenopodioides
Pseudogynoxys cabrerae
I googled Pseudogynoxys cabrerae and LOOOK at the leaves!!
http://www.flickr.com/photos/3...
https://www.google.be/search?q...
Now I am confused again, they do look like mine!!
