What is "heterosperma"

Heterosperma is a genus of flowering plants in the sunflower family, native to North and South America.

1. Heterosperma achaetum S.F.Blake - Colombia
2. Heterosperma diversifolium Kunth - Bolivia, Peru, Argentina, Ecuador
3. Heterosperma nanum (Nutt.) Sherff - Bolivia, Peru, Argentina, Chile
4. Heterosperma ovatifolium Cav. - Bolivia, Peru, Argentina, Chile
5. Heterosperma pinnatum Cav. - Mesoamerica, United States ( Arizona, New Mexico, Texas, Colorado), Bolivia, Venezuela
6. Heterosperma tenuisectum (Griseb.) Cabrera - Bolivia, Peru, Argentina
7. Heterosperma xanti A.Gray - Baja California Sur