Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

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

Cirsium ochrocentrum, Yellowspine Thistle

Kallstroemia grandiflora, Arizona Poppy

Arizona Poppy has large beautiful deep orange flowers with red centers. The flowers may grow as large as 2 ½ inches wide with excellent rainfall. Kallstroemia grandiflora Arizona Poppy has 5 deep orange petals and 5 thin sepals outside of the petals. Kallstroemia grandiflora Arizona Poppy is a handsome plant with pinnately compound leaves and deep orange flowers. Preferred habitats are open plains, mesas and in sandy desert washes. Kallstroemia grandiflora Arizona Poppy, Desert Poppy or Mexican Poppy grows to 2 or 3 feet tall and as wide. This species blooms from February to September in Arizona and September to October in California and Texas. Kallstroemia grandiflora

Scientific Name: Kallstroemia grandiflora
Common Name: Arizona Poppy
Also Called: Arizona Poppy, Desert Poppy, Mexican Poppy, Orange Caltrop, Summer Poppy (Spanish: Baiburín, Baiborín, Mal de Ojo, Vaivurín)
Family: Zygophyllaceae, Caltrop Family
Synonyms: (Kallstroemia grandiflora var. arizonica, Kallstroemia grandiflora var. detonsa, Tribulus grandiflorus)
Status: Native
Duration: Annual
Size: 2 to 3 tall more or less and may by found in clumps up to 5 feet wide with excellent rainfall.
Growth Form: Forb/herb; plants decumbent to ascending; stems quite hairy, hirsute-hispid and other hairs pilose.
Leaves: Green; opposite; pinnately compound; stipules present; 5-16 leaflets; fruit ovoid.
Flower Color: Orange, deep orange; flowers can get up to 2½ inches on large well watered plants; flowers solitary in axils.
Flowering Season: February to September; September to October in California and July to September in Texas.
Elevation: Below 5,000 feet; up to 3,000 feet in California.

Habitat Preferences: Common open plains and mesas; uncommon in California along sandy roadsides and sandy deserts, plains and mesas below 5000 ft in Texas.

Recorded Range: Kallstroemia grandiflora is found in the southwestern United States in AZ, CA, NM, TX. It is also native to Mexico, few records in Baja California. In Arizona it is found Yavapai, Maricopa and Yuma counties, and in the southern part of the state and in Greenlee County.

North America & US County Distribution Map for Kallstroemia grandiflora.

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

Genus Information: In North America there are 7 species and 7 accepted taxa overall for Kallstroemia. World wide, The Plant List includes 31 accepted species names and includes a further 6 infraspecific rank for the genus.

In the Southwestern United States: Arizona and New Mexico each have 4 species of Kallstroemia, California has 3 species, Nevada and Utah each have 2 species, Texas has 6 species. All data is approximate and subject to taxonomic changes.

Comments: In years with good winter or mid-summer rainfall Arizona Poppy can become quite prolific with deep orange flowers.

The type from along the Gila River, Arizona (Emory). The deep orange flowers of Kallstroemia grandiflora superficially resemble those the California Poppy (Eschscholtzia californica) and thus the common name Arizona Poppy.

Date Profile Completed: 09/30/2016, updated format 10/06/2017
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California.
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search - (accessed 09/30/2016)
The Plant List (2013). Version 1.1. Published on the Internet; (accessed 09/30/2016).
Native Plant Information Network, NPIN (2013). Published on the Internet [accessed: 09/30/2016]. Lady Bird Johnson Wildflower Center at The University of Texas, Austin, TX.
The Jepson Desert Manual; 2002; Baldwin, Bruce G., et. al.; The Jepson Desert Manual: Vascular Plants of Southeastern California; Univ. of California Press, Berkeley and Los Angeles, California
SEINet for synonyms, scientific names, recorded geographic locations and general information 09/30/2016).