Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

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

Cirsium ochrocentrum, Yellowspine Thistle

Senecio lemmonii, Lemmon's Ragwort

Senecio lemmonii, Lemmon's Ragwort, Southwest Desert Flora Senecio lemmonii, Lemmon's Ragwort, Southwest Desert Flora Senecio lemmonii, Lemmon's Ragwort, Southwest Desert Flora    Senecio lemmonii, Lemmon's Ragwort, Southwest Desert Flora Senecio lemmonii, Lemmon's Ragwort, Southwest Desert Flora    Senecio lemmonii, Lemmon's Ragwort, Southwest Desert Flora

Scientific Name: Senecio lemmonii
Common Name: Lemmon's Ragwort
Also Called: Lemmon Groundsel
Family: Asteraceae, Sunflower Family
Synonyms: ( )
Status: Native
Duration: Perennial
Size: Up to 3 feet.
Growth Form: Forb/herb; subshrub; erect usually with one stem with multiple branching, glabrous.
Leaves: Green; alternate; lanceolate, upper leaves sessile or clasping stem; margins with small teeth.
Flower Color: Yellow; radiate heads about an inch or more wide, 8 or more yellow ray flowers, disk flowers orange-yellow; fruit is an achene.
Flowering Season: February to May.
Elevation: 1,500 to 3,500 feet.
Habitat Preferences: Rocky slopes and common in shrubs for support.
Recorded Range: A rare plant in the United States found only in Arizona where it grows in the central and southern parts of the state as well as Yuma and Navajo Counties. It is also common in Baja California.

U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.
Wetland Indicator: No data available.
Threatened/Endangered Information: No data available.

Genus Information: 69 species in Senecio throughout all of North America and Greenland. 13 species in Arizona.

Comments: Lemmon's Ragwort is an early spring bloomer that is common in Arizona in preferred habitats. Photo above taken April 12 along the Apache Trail, Fish Creek Hill, Maricopa County, Arizona.

Also see Threadleaf Ragwort, Senecio flaccidus var. flaccidus and Smooth Threadleaf Ragwort, Senecio flaccidus var. monoensis.

Date Profile Completed: 10/27/2012; Updated, 07/26/2015
References:
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles
Theodore M. Barkley, FNA | Family List | FNA Vol. 20 | Asteraceae | Senecio, Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico. 16+ vols. New York and Oxford. (accessed 10/27/2012)
SEINet for synonyms, scientific names and recorded geographic locations, http://swbiodiversity.org/seinet/