Isocoma, commonly called jimmyweed or goldenweed,116573 Flora of North America Vol. 20 Page 439 Jimmyweed, goldenweed, Isocoma Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 320. 1840. is a genus of North American semi-woody shrubs in the family Asteraceae. It is found in the semi-arid areas of Southwestern United States and Mexico.Nuttall, Thomas. 1840. Transactions of the American Philosophical Society, new series 7: 320 in EnglishTropicos, Isocoma Nutt.
The name of this genus is derived from the Greek for "equal hair" referring to the pappus on the achene.
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).
SpeciesBiota of North America Program 2013 county distribution mapsThe Plant List search for IsocomaNesom, G.L. 1991. Taxonomy of Isocoma (Compositae: Astereae). Phytologia 70(2): 69–114 includes descriptions and distribution maps for 15 species Isocoma acradenia (Greene) Greene - alkali goldenbush, alkali jimmyweed - Baja California, Sonora, California Arizona Nevada Utah Isocoma arguta Greene - Carquinez goldenbush - Solano County in California Isocoma azteca G.L.Nesom - Aztec goldenbush - Arizona New Mexico Isocoma coronopifolia (Gray) Greene - common goldenbush, goldenweed - southern Texas, Coahuila, Nuevo León, Tamaulipas Isocoma drummondii (Torr. & Gray) Greene - Drummond's goldenbush, Drummond's jimmyweed - southern Texas, Tamaulipas Isocoma felgeri G.L.Nesom - Sonora Isocoma gypsophila B.L.Turner - Zacatecas, Nuevo León Isocoma hartwegii (A.Gray) Greene - San Luis Potosí, Zacatecas, Guanajuato Isocoma humilis G.L.Nesom - Zion goldenbush - Utah (Kane + Washington Cos) Isocoma menziesii (Hook. & Arn.) G.L.Nesom - Menzies' goldenbush - Baja California, California Isocoma pluriflora (Torr. & Gray) Greene - rayless goldenrod, southern goldenbush, southern jimmyweed - Texas New Mexico Arizona Chihuahua Isocoma rusbyi Greene - Rusby's goldenbush - Arizona New Mexico Utah Colorado Isocoma tehuacana G.L.Nesom - Puebla Isocoma tenuisecta Greene - burrow goldenweed, burroweed - Arizona New Mexico Isocoma tomentosa G.L.Nesom - Chihuahua Isocoma veneta (Kunth) Greene - jimmyweed - Mexico from Coahuila to Oaxaca
References
External links
USDA Plants Profile for Isocoma (goldenbush) Integrated Taxonomic Information System Jepson Manual