Chorizanthe rigida, with the common names of devil's spineflower, rigid spineflower, spiny-herb, rigid spiny-herb, is an annual plant in the Polygonaceae family the buckwheats. It is a member of the genus Chorizanthe, the spineflowers and is found in the southwestern United States and northwest Mexico, in the states of California, Nevada, Utah, Arizona, Baja California, and Sonora. Chorizanthe rigida is a common desert plant found in the Sonoran and Mojave Desert - in bajadas (washes), flat mesas that flood with annual rains, and rocky hillsides and ridgelines. A locale range example is its presence in most habitats of the Muggins Mountains Wilderness in southeastern Arizona. In desert flats, the short 3 inch plant can be easily obscured, by downstream-washed debris that easily collects on the spineflower skeleton. Thus small hillocks of debris are found, a spineflower in the core; possibly this is the advantageous form of germinating at least the source location into a second generation. In flat mesas the plant can be hidden under clumps and not seen. On a roadside, its skeleton will be left as a single erect plant, the taller plants being found in the highest water-pooled areas.