Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Agoseris glauca, Pale Agoseris

Pale Agoseris has yellow flowers consisting of entirely of “ligulate” disk florets, completing without ray florets. This species blooms from May to October throughout its large geographic range. Agoseris glauca Pale Agoseris has pretty flowers that sit atop long leafless stalks, or botanically correct “scapes”. Agoseris glauca Pale Agoseris is common throughout the western half of the United States and most of Canada. It is found in elevations ranging from 4,500 to 9,000 feet, not a desert species. Agoseris glauca    Pale Agoseris, also called False- or Pale-Dandelion, should not be confused with the more traditional common Dandelion, Taraxacum officinale, although it is superficially similar in appearance. Agoseris glauca

Scientific Name: Agoseris glauca
Common Name: Pale Agoseris
Also Called: False Dandelion, Pale Mountain Dandelion, Prairie Dandelion
Family: Asteraceae, Sunflower Family
Synonyms: (Agoseris altissima, Agoseris apiculata, Agoseris lacera, Agoseris leontodon var. aspera, Agoseris leontodon var. pygmaea, Agoseris pubescens)
Status: Native
Duration: Perennial
Size: Up to 1 foot.
Growth Form: Forb/herb; subshrub; erect; milky sap, considerable vegetative variations locally and across its wide geographic range.
Leaves: Highly variable, dark green; basal leaves only, up to 12 inches; leaves erect or with tips ascending; linear, lanceolate or oblanceolate, some varieties with lobed leaves; margins entire or dentate, glabrous or with soft white hairs.
Flower Color: Yellow; ligulate florets; usually single 1 inch flower heads on tips of long leafless stalks (scape); an attractive series of pointed bracts or phyllaries; fruit is an achene with soft white bristles resembling the puff ball of a Dandelion.
Flowering Season: May to October.
Elevation: 4,500 to 9,000 feet.

Habitat Preferences: Mid to higher elevations in Arizona, multiple habitat; sunny open areas in coniferous forests such as meadows and slopes.

Recorded Range: Pale Agoseris is common throughout the western half of the United States and most of Canada. In northern Arizona, Pima and Graham Counties.

North America & US County Distribution Map for Agoseris glauca.

U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.

Wetland Indicator: In North America Agoseris glauca has the following wetland designations: Alaska, FAC; Arid West, FACU; Great Plains, FACU; Midwest, FACU; Northcentral & Northeast, FACU; Western Mountains, Valleys, and Coast, FAC.
FAC = Facultative, occur in wetlands and non-wetlands
FACU = Facultative Upland, usually occur in non-wetlands, but may occur in wetlands.

Threatened/Endangered Information: The State of Michigan has listed Agoseris glauca (Prairie or Pale Agoseris) as Threatened.

Genus Information: In North America there are 10 species and 10 accepted taxa overall for Agoseris. World wide, The Plant List includes 15 accepted species names and includes a further 72 of infraspecific rank for the genus. Common names for this genus are Mountain Dandelion and False Dandelion.

In the Southwestern United States: Arizona and New Mexico each have 3 species of Agoseris, California has 7 species, Nevada has 6 species, Texas has 0 species, Utah has 5 species. All data is approximate and subject to taxonomic changes.

There are 6 varieties in Agoseris glauca;
Agoseris glauca var. agrestis, Pale Agoseris, (CO, MN, NV, ID, OR, UT, WA)
Agoseris glauca var. cronquistii, Pale Agoseris, (UT only)
Agoseris glauca var. dasycephala, Pale Agoseris, (NW U.S., Canada; AZ, CO, UT)
Agoseris glauca var. glauca, Pale Agoseris, (W½ U.S., Canada; AZ, CA, CO, NM, NV, UT)
Agoseris glauca var. laciniata, False Agoseris (W½ U.S., AZ, CA, CO, NM, NV, UT)
Agoseris glauca var. monticola, Pale Agoseris (CA, ID, NV, OR, WA).

Comments: Pale Agoseris is not a desert species and is typically found at higher elevations in mixed coniferous forest communities. Pale Agoseris, also called False- or Pale-Dandelion, should not be confused with the more traditional common Dandelion, Taraxacum officinale, although it is superficially similar in appearance.

Pale Agoseris is one of three Agoseris species native to Arizona which also includes Annual Agoseris, Agoseris heterophylla and Orange Agoseris, Agoseris aurantiaca.

An infusion of the entire plant was used to wash sores and rashes and an infusion of roots was taken as a laxative by the Okanagan-Colville Indians of British Columbia and Washington. See species account from Native American Ethnobotany, University of Michigan, Dearborn.

Date Profile Completed: 8/8/2012; Updated, 07/25/2015, updated 09/05/2017
References:
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search - (accessed 09/04/2017)
https://plants.usda.gov/java/ClassificationServlet?source=profile&symbol=AGOSE&display=31
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 09/04/2017).
http://www.theplantlist.org/1.1/browse/A/Compositae/Agoseris/
Gary I. Baird, FNA | Family List | FNA Vol. 19, 20 and 21 | Asteraceae | Agoseris, Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico. 16+ vols. New York and Oxford.
SEINet synonyms, scientific names, geographic locations, general information, (accessed 09/04/2017).
http://swbiodiversity.org/seinet/