What is "gymnocoronis"

Gymnocoronis is a genus of flowering plants in the sunflower family.

1. Gymnocoronis latifolia Hook. & Arn. - Guatemala, Mexico (from Tamaulipas to Chiapas)
2. Gymnocoronis matudae R.M.King & H.Rob. - Campeche
3. Gymnocoronis sessilis S.F.Blake - Tabasco, Chiapas, Veracruz, Jalisco, Guatemala
4. Gymnocoronis spilanthoides (D.Don ex Hook. & Arn.) DC. - Brazil, Peru, Bolivia, Paraguay, Uruguay, Argentina; naturalized in Australia, New Zealand, China