Triangleleaf Bursage. Ambrosia deltoidea, Aster Family ( Asteraceae ) Formerly called the Compositae or composite family., Triangleleaf Bursage. Also Called: Franseria deltoidea, Triangle Burr Ragweed, Triangle Leaf Bursage, Rabbit Bush. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. A sprawling shrub up to 3 1/2 feet tall. With red - brown bark becoming smooth and shiny. The stems are red - brown with white a pubescence, stout, brittle, with narrow leaf scars. The leaves are alternate, simple, evergreen, and triangular shaped, they are coarse serrate or toothed, green above and below but covered in a pale pubescence, they are drought deciduous. The flowers are a dull yellow-green, in small clusters borne on a spike, and present in late winter to early spring. Quick Notes: Height: Up To About 40" Tall. Same spread. Flowers: Yellow - green, 5 large yellow petals about 1/2 inch long, with red - brown veins, 10 stamens with large orange anthers. Flowering Time: Mid February - October. Fruit: Slightly curved pods, 3/4 to 1 1/3 inches long, are tipped by a stiff point about 1/8 inch long. Leaves: Dull green pinnate leaves with 2 to 3 pairs of elliptical leaflets. Found: The USDA claims that Ambrosia deltoidea is native to the USA (AZ). In Arizona it is native to Yuma, Maricopa, Gila, Pinal, & Pima counties. In Mexico it is native to the states of Baja Norte, & Sonora. Found throughout lower elevations in Arizona. Hardiness: USDA Zone 9a: to -6.6 �C (20 �F) USDA Zone 9b: to -3.8 �C (25 �F) USDA Zone 10a: to -1.1 �C (30 �F) USDA Zone 10b: to 1.7 �C (35 �F) USDA Zone 11: above 4.5 �C (40 �F) Soil pH requirements: 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) Sun Exposure: Full Sun Elevation: 0 - 3,200 Feet. Habitat: On roadsides, sandy plains, rocky sides of stream beds, and mesas, in deserts and arid grasslands. Well drained soil is preferred. Miscellaneous: Flowering Photos Taken February 14, 2006. in Peoria, Arizona. Very common low water use landscaping plant in the Phoenix and Tucson areas.

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