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Arizona Poppy, Arizona Caltrop
Scientific Name: Kallstroemia grandiflora Torr. ex Gray
Family: Zygophyllaceae
Arizona Poppy, Arizona Caltrop (Kallstroemia  grandiflora)
Kallstroemia grandiflora, photo by Clarence A. Rechenthin. Courtesy of USDA NRCS Texas State Office.
Recommended Temperature Zone:
USDA: 8b-11

Sun Exposure: Full sun

Origin: Sonoran and Chihuahuan Deserts (Arizona, California, New Mexico, Texas), northern Mexico, from sea level to 6000 feet elevation (1800 m)

Growth Habits: Annual, prostrate branched stems up to 3 feet spread (90 cm); opposite, pinnately compound leaves

Watering Needs: Little to moderate water

Propagation: Seeds in spring or autumn (soak the seeds for a few hours to speed up germination)

Blooming Habits:
Yellowish orange (sometimes pink) 5-petaled flowers with reddish veins and center, 1 to 2 inches in diameter (2.5-5 cm) in summer. They open in the morning and becomes paler as the day goes by.

Fruiting Habits:

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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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