Isocoma acradenia, Alkali Goldenbush
Scientific Name: Isocoma acradenia
Common Name: Alkali Goldenbush
Also called: Alkali Jimmyweed, Desert Isocoma
Family: Asteraceae, Sunflower Family
Synonyms: ( Haplopappus acradenius, Aplopappus acradenius)
Perennial Size: Up to 4 feet (1.3 m) 40 inches (1 m)
Growth Form: or Shrub ; rounded, bushy, plants upright or subshrub , multiple upright shiny stems; minute short hairs; plants sticky from erect ; older stems becoming yellowish-tan or yellowish-gray.
resin Leaves: Green to light gray-green; older leaves becoming light gray or tan; leaves arranged along stem; leaves simple, mostly narrowly alternately ; leaves with small linear .
glands Flower Color: Yellow; clusters of 4 or 5 flower heads; floral heads with disk only; florets is a fruit with coarse permanent cypsela
pappus Flowering Season: June through October or much of the year with good summer and winter rainfall.
Elevation: Up to 4,000 feet (1,219 m)
Habitat Preferences: Various habitats, lower and upper deserts, Creosote Bush communities, saline or and gypsum soils, sandy, gravelly areas.
alkaline Recorded Range: In the United States Isocoma acradenia is found only in AZ, CA, NV and UT; mostly in AZ, CA and NV. It is also to northwest Mexico and Baja California.
North America & US County Distribution Map for
. Isocoma acradenia
North America species range map for Alkali Goldenbush,
North American range map courtesy of Virginia Tech, Dept. of Forest Resources & Environmental Conservation
Click image for full size map U.S. Weed Information: Unknown
Invasive/Noxious Weed Information: Unknown
Threatened/Endangered Information: Unknown
Wetland Indicator: In North America Isocoma acradenia has the following wetland designations:
Arid West, FACU
Western Mountains, Valleys, and Coast, FACU;
FACU = Facultative Upland, usually occur in non-wetlands, but may occur in wetlands
Genus Information: In North America there are 11 species and 11 accepted taxa overall for Isocoma. Worldwide, The Plant List includes 15 accepted species names and a further 44 scientific names of infraspecific rank for Isocoma.
The genus Isocoma was published by , in 1840.
Thomas Nuttall, (1786-1859)
In the Southwestern United States: Arizona has
5 species of Isocoma, California, Utah and Texas each have 3 species, Nevada has 1 species and New Mexico has 4 species. Data approximate and subject to revision.
3 varieties in Isocoma acradenia;
Isocoma acradenia var. acradenia, Alkali Goldenbush (AZ, CA, NV)
Isocoma acradenia var. bracteosa, Alkali Goldenbush (CA)
Isocoma acradenia var. eremophila, Alkali Goldenbush (AZ, CA, NV, UT)
Comments: Alkali Goldenbush, a Mojave Desert species, is common throughout its range. It is one of several yellow fall blooming in the state. Formerly included in the large genus subshrubs Haplopappus, Alkali Goldenbush was moved to the genus Isocoma along with several other genera.
It is similar in appearance to the closely related Burroweed,
Isocoma tenuisecta which has deeply divided ( ) leaves. pinnately
, also see Burroweed, Southwest Desert Flora , Southern Goldenbush, Isocoma tenuisecta and Rusby's Goldenbush, Isocoma pluriflora . Isocoma rusbyi
Alkali Goldenbush, Importance to Wildlife, Birds and Livestock Isocoma acradenia, flowers, seeds and plants may be visited by hummingbirds and/or small mammals including rodents in search of food, nectar, shelter and protection through cover.
Alkali Goldenbush, Beneficial Value to Butterflies, Bees and Insects Isocoma acradenia, brightly colored flowers and plants are visited by butterflies, moths and other insects in search of food, nectar or shelter.
The genus Etymology: (Isoco'ma:) is from the Greek meaning “an equal hair-tuft,” and referring to the flowers.
“Isocoma” The genus Isocoma was published by , in 1840.
Thomas Nuttall, (1786-1859) The species epithet “ (acrade'nia:) from the Greek for “pointed-glanded,” each of the acradenia” involucre having a large bracts at its tip.
Southern California Ethno-Herbalist ; Ethnobotany of Southern California Native Plants: Alkali Goldenbush, Ethno-Herbalist: Southern California Ethnobotany Isocoma acradenia; for complete information click here.
Date Profile Completed: 8/4/2012;
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, as Aplopappus acradenius.
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search - (accessed 08/24/2020)
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 08/24/2020).
, NPIN (2013). Published on the Internet http://www.wildflower.org/plants/ (accessed 08/24/2020). Lady Bird Johnson Wildflower Center at The University of Texas, Austin, TX.
Native Plant Information Network https://www.wildflower.org/plants/result.php?id_plant=ISAC2
Michael J. Plagens; Arizonensis; Field Guide; Sonoran Desert Flora; Alkali Goldenbush, Isocoma acradenia (accessed 08/24/2020).
The Jepson Manual, David J. Keil 2012, Isocoma acradenia, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=3630, accessed on August 24, 2020.
Guy L. Nesom, FNA | Family List | FNA Vol. 20 | Asteraceae, Isocoma, 1. Isocoma acradenia (Greene) Greene, Erythea. 2: 111. 1894. Flora of North America Editorial Committee, eds.; 1993+. Flora of North America North of Mexico. 16+ vols. New York and Oxford.
Wikipedia contributors, 'Isocoma acradenia', Wikipedia, The Free Encyclopedia, 27 January 2020, 06:26 UTC,
https://en.wikipedia.org/w/index.php?title=Isocoma_acradenia&oldid=937789113 [accessed 24 August 2020]
FNA 2006, Benson and Darrow 1981, Kearney and Peebles 1969; Editors S.Buckley 2010, F.S.Coburn 2015; from SEINet Field Guide, on-line; (accessed 08/24/2020)
Plagens, Michael J., Arizonensis On-line Naturalist; Alkali Goldenbush, Isocoma acradenia (accessed 08/20/2020).
SEINet synonyms, scientific names, geographic locations, general information.
Etymology: Michael L. Charters California Plant Names: Latin and Greek Meanings and Derivations; A Dictionary of Botanical and Biographical Etymology - (accessed 08/24/2020)