What is "helianthella"

Helianthella, the little sunflower, is a genus of North American plants in the sunflower family.

1. Helianthella californica A.Gray - California, Nevada, Oregon
2. Helianthella castanea Greene - San Francisco Bay region
3. Helianthella ciliata S.F.Blake - Chihuahua
4. Helianthella durangensis B.L.Turner - Durango
5. Helianthella gypsophila B.L.Turner - Nuevo León, Coahuila
6. Helianthella mexicana A.Gray - San Luis Potosí, Zacatecas, etc
7. Helianthella microcephala (A.Gray) A.Gray - Arizona, New Mexico, Colorado, Utah
8. Helianthella parryi A.Gray - Arizona, New Mexico, Colorado, Utah
9. Helianthella quinquenervis (Hook.) A.Gray - from Coahuila to Oregon + Montana
10. Helianthella uniflora (Nutt.) Torr. & A.Gray - from New Mexico to British Columbia