# Isocoma

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***Isocoma***, commonly called **jimmyweed** or **goldenweed**,[1] is a genus of North American semi-woody shrubs in the family [Asteraceae](/source/Asteraceae). It is found in the semi-arid areas of Southwestern [United States](/source/United_States) and [Mexico](/source/Mexico).[2][3][4]

The name of this genus is derived from the Greek for "equal hair" referring to the pappus on the seed.[1]

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

**Species[5][6][7][8]**

- *[Isocoma acradenia](/source/Isocoma_acradenia)* (Greene) Greene - alkali goldenbush, alkali jimmyweed - [Baja California](/source/Baja_California), [Sonora](/source/Sonora), [California](/source/California) [Arizona](/source/Arizona) [Nevada](/source/Nevada) [Utah](/source/Utah)
- *[Isocoma arguta](/source/Isocoma_arguta)* Greene - Carquinez goldenbush - [Solano County](/source/Solano_County,_California) in [California](/source/California)
- *[Isocoma azteca](/source/Isocoma_azteca)* G.L.Nesom - Aztec goldenbush - [Arizona](/source/Arizona) [New Mexico](/source/New_Mexico)
- *[Isocoma coronopifolia](/source/Isocoma_coronopifolia)* (Gray) Greene - common goldenbush, goldenweed - southern [Texas](/source/Texas), [Coahuila](/source/Coahuila), [Nuevo León](/source/Nuevo_Le%C3%B3n), [Tamaulipas](/source/Tamaulipas)
- *[Isocoma drummondii](/source/Isocoma_drummondii)* (Torr. & Gray) Greene - Drummond's goldenbush, Drummond's jimmyweed - southern [Texas](/source/Texas), [Tamaulipas](/source/Tamaulipas)
- *[Isocoma felgeri](/source/Isocoma_felgeri)* G.L.Nesom - Sonora
- *[Isocoma gypsophila](/source/Isocoma_gypsophila)* B.L.Turner - [Zacatecas](/source/Zacatecas), [Nuevo León](/source/Nuevo_Le%C3%B3n)
- *[Isocoma hartwegii](/source/Isocoma_hartwegii)* (A.Gray) Greene - [San Luis Potosí](/source/San_Luis_Potos%C3%AD), [Zacatecas](/source/Zacatecas), [Guanajuato](/source/Guanajuato)
- *[Isocoma humilis](/source/Isocoma_humilis)* G.L.Nesom - Zion goldenbush - [Utah](/source/Utah) ([Kane](/source/Kane_County,_Utah) + [Washington](/source/Washington_County,_Utah) Cos)
- *[Isocoma menziesii](/source/Isocoma_menziesii)* (Hook. & Arn.) G.L.Nesom - Menzies' goldenbush - [Baja California](/source/Baja_California), [California](/source/California)
- *[Isocoma pluriflora](/source/Isocoma_pluriflora)* (Torr. & Gray) Greene - rayless goldenrod, southern goldenbush, southern jimmyweed - [Texas](/source/Texas) [New Mexico](/source/New_Mexico) [Arizona](/source/Arizona) [Chihuahua](/source/Chihuahua_(state))
- *[Isocoma rusbyi](/source/Isocoma_rusbyi)* Greene - Rusby's goldenbush - [Arizona](/source/Arizona) [New Mexico](/source/New_Mexico) [Utah](/source/Utah) [Colorado](/source/Colorado)
- *[Isocoma tehuacana](/source/Isocoma_tehuacana)* G.L.Nesom - [Puebla](/source/Puebla)
- *[Isocoma tenuisecta](/source/Isocoma_tenuisecta)* Greene - burrow goldenweed, burroweed - [Arizona](/source/Arizona) [New Mexico](/source/New_Mexico)
- *[Isocoma tomentosa](/source/Isocoma_tomentosa)* G.L.Nesom - [Chihuahua](/source/Chihuahua_(state))
- *[Isocoma veneta](/source/Isocoma_veneta)* (Kunth) Greene - jimmyweed - [Mexico](/source/Mexico) from [Coahuila](/source/Coahuila) to [Oaxaca](/source/Oaxaca)

## References

1. [[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=](http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=)*116573* Flora of North America Vol. 20 Page 439 Jimmyweed, goldenweed, Isocoma Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 320. 1840. ]

1. [Nuttall, Thomas. 1840. Transactions of the American Philosophical Society, new series 7: 320](https://www.biodiversitylibrary.org/page/36318041#page/342/mode/1up) in English

1. [Tropicos, *Isocoma* Nutt.](http://www.tropicos.org/Name/40031968)

1. Everitt, J.H.; Lonard, R.L.; Little, C.R. (2007). *Weeds in South Texas and Northern Mexico*. Lubbock: Texas Tech University Press. ISBN 0-89672-614-2

1. ["Flann, C (ed) 2009+ Global Compositae Checklist"](https://archive.today/20141204115007/http://dixon.iplantcollaborative.org/CompositaeWeb/default.aspx?Page=NameDetails&TabNum=0&NameId=1e797275-fbdc-4cc6-ae90-6cd3f76693ea). Archived from [the original](http://dixon.iplantcollaborative.org/CompositaeWeb/default.aspx?Page=NameDetails&TabNum=0&NameId=1e797275-fbdc-4cc6-ae90-6cd3f76693ea) on 2014-12-04. Retrieved 2014-12-04.

1. [Biota of North America Program 2013 county distribution maps](http://bonap.net/NAPA/TaxonMaps/Genus/County/Isocoma)

1. [The Plant List search for *Isocoma*](http://www.theplantlist.org/tpl1.1/search?q=Isocoma)

1. [Nesom, G.L. 1991. Taxonomy of *Isocoma* (Compositae: Astereae). Phytologia 70(2): 69–114](https://www.biodiversitylibrary.org/page/12981103#page/3/mode/1up) includes descriptions and distribution maps for 15 species

## External links

- [USDA Plants Profile for *Isocoma* (goldenbush)](http://plants.usda.gov/plant-profile?symbol=ISOCO)
- [Integrated Taxonomic Information System](https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=37801)
- [Jepson Manual](http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1449)

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Adapted from the Wikipedia article [Isocoma](https://en.wikipedia.org/wiki/Isocoma) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Isocoma?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.