What is "isocoma"

Isocoma commonly called Jimmyweed or goldenweed, is a genus of North American semi-woody shrubs in the sunflower family. It is found in the semi-arid areas of Southwestern United States and Mexico.

The name of this genus is derived from the Greek for "equal hair" referring to the pappus on the seed.

Isocoma species are used as food plants by the larvae of some Lepidoptera species including Schinia bicuspida (recorded on I. drummondii), Schinia erosa (feeds exclusively on I. acradenia) and Schinia tertia (recorded on I. pluriflora).

1. Isocoma acradenia (Greene) Greene - alkali goldenbush, alkali jimmyweed - Baja California, Sonora, California Arizona Nevada Utah
2. Isocoma arguta Greene - Carquinez goldenbush - Solano County in California
3. Isocoma azteca G.L.Nesom - Aztec goldenbush - Arizona New Mexico
4. Isocoma coronopifolia (Gray) Greene - common goldenbush, goldenweed - southern Texas, Coahuila, Nuevo León, Tamaulipas
5. Isocoma drummondii (Torr. & Gray) Greene - Drummond's goldenbush, Drummond's jimmyweed - southern Texas, Tamaulipas
6. Isocoma felgeri G.L.Nesom - Sonora
7. Isocoma gypsophila B.L.Turner - Zacatecas, Nuevo León
8. Isocoma hartwegii (A.Gray) Greene - San Luis Potosí, Zacatecas, Guanajuato
9. Isocoma humilis G.L.Nesom - Zion goldenbush - Utah ( Kane + Washington Cos)
10. Isocoma menziesii (Hook. & Arn.) G.L.Nesom - Menzies' goldenbush - Baja California, California
11. Isocoma pluriflora (Torr. & Gray) Greene - rayless goldenrod, southern goldenbush, southern jimmyweed - Texas New Mexico Arizona Chihuahua
12. Isocoma rusbyi Greene - Rusby's goldenbush - Arizona New Mexico Utah Colorado
13. Isocoma tehuacana G.L.Nesom - Puebla
14. Isocoma tenuisecta Greene - burrow goldenweed, burroweed - Arizona New Mexico
15. Isocoma tomentosa G.L.Nesom - Chihuahua
16. Isocoma veneta (Kunth) Greene - jimmyweed - Mexico from Coahuila to Oaxaca