|South Mountain, Phoenix, Arizona|
Ambrosia ambrosioides, also known as canyon ragweed or chicura is a ragweed found in the deserts of northern Mexico (Baja California, Baja California Sur, Chihuahua, Durango, Sonora), Arizona, and California (Ventura + San Diego Counties).
Growing as a shrub from 1–2 meters high, its elongate, coarsely-toothed leaves range from 4–18 cm long and 1.5–4 cm wide. It is monoecious, with both terminal and axillary racemes consisting of staminate heads occurring above their pistillate counterparts. Flowering occurs mainly in February through April. The fruits are 10–15 mm burs covered with hooked spines.
This ragweed can be found in sandy washes and other disturbed areas such as roadsides, and is sometimes seen growing in rock crevices.
- The Plant List Ambrosia ambrosioides (Cav.) W.W.Payne
- Flora of North America Vol. 21 Page 12 Ambrosia ambrosioides (Delpino) W. W. Payne, J. Arnold Arbor. 45: 410. 1964.
- Raymond M. Turner, Janice E. Bowers, and Tony L. Burgess, Sonoran desert plants: an ecological atlas (Tucson: The University of Arizona Press, 1995) pp. 75–76
- Biota of North America Program 2014 county distribution map
- Calflora taxon report, University of California, Ambrosia ambrosioides (Cav.) Payne, ambrosia bursage, ambrosia leaved burbush
- Felger, Richard; Mary B. Moser. (1985). People of the desert and sea: ethnobotany of the Seri Indians. Tucson: University of Arizona Press.
- Jepson Manual Treatment
- United States Department of Agriculture Plants Profile
- Calphotos Photo gallery, University of California
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