Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

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

Cirsium ochrocentrum, Yellowspine Thistle

Perityle emoryi, Emory's Rockdaisy

Perityle emoryi, Emory's Rockdaisy, Southwest Desert Flora Perityle emoryi, Emory's Rockdaisy, Southwest Desert FloraPerityle emoryi, Emory's Rockdaisy, Southwest Desert Flora Perityle emoryi, Emory's Rockdaisy, Southwest Desert Flora

Scientific Name: Perityle emoryi
Common Name: Emory's Rockdaisy
Also called: Desert Rock Daisy, Emory Rockdaisy, Emory Rockdaisy, Emory's Rocklily
Family: Asteraceae, Sunflower Family
Synonyms: (Perityle emoryi var. nuda)
Status: Native
Duration: Annual
Size: Up to 2 feet.
Growth Form: Forb/herb; erect or sprawling, stems small and single or thick and branching, delicate or robust, slightly pubescent to rough hairy, glands present.
Leaves: Leaves green; mostly alternate; variable in shape, petiole present; heart shaped with fringes, oval, round or triangular; margins with teeth or dissected, palmately (palmatifid) lobed or cleft.
Flower Color: White with yellow center; radiate small heads single or multiples; ray flowers 8 to 12, disk flowers numerous, yellow; flowering stalks (peduncle) to 3 inches; inflorescence typically flat-topped cluster of flowers; fruit is an achene.
Flowering Season: February to October.
Elevation: Up to 3,000 feet.

Habitat Preferences: Various habitats, lower deserts primarily, rocky hillsides and rocky cliffs, sandy or gravelly soil, desert washes.

Recorded Range: Found in southwest United States in AZ, CA, NV and UT with large populations throughout Baja California, northwest Mexico and South America. Introduced species in Hawaii. Occurs in the western 23 of Arizona.

North America & US County Distribution Map for Perityle emoryi.

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: 36 species in Perityle in southwest United States. 13 species native to Arizona.

Comments: Emory's Rockdaisy is a pretty daisy-like adaptable wildflower common in the lower desert areas of the southwest and may become a non-aggressive weed in desert landscapes. It is extremely variable in looks and profile which may be delicate single erect stem plants or more robust multi-branched or sprawling plants, and it might be slightly hairy to rough glandular hairy.

Emory’s Rockdaisy is found in multiple habitat types from deserts to along the coastal areas of California.

Date Profile Completed: 7/9/2012; Updated, 07/26/2015, updated 01/20/2016, updated format 10/10/2017
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
The Jepson Manual, Citation: Thu Aug 9 13:49:03 2012
Sharon C. Yarborough, A. Michael Powell, FNA | Family List | FNA Vol. 21 | Asteraceae Perityle, Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico. 16+ vols. New York and Oxford. (accessed 07/09/2012)
SEINet for synonyms, scientific names and recorded geographic locations,