Sexual reproduction - Brittle bush reproduces almost exclusively by seed
[7,45]. Seeds are dispersed long distances by wind. Brittle bush often
germinates prolifically after heavy winter rains . Plants are not
frost tolerant, and frost may damage leaves and stems .
Reproduction may be reduced by interspecific competition. Growth and
productivity of brittle bush is limited by the low precipitation in its
native habitat. Neighboring brittle bush further decrease water availability,
reducing brittle bush productivity .
Vegetative reproduction - Brittle bush can sprout from the root crown
Brittle bush is allelopathic. The leaves produce a toxic, water-soluble
substance that inhibits the growth of several winter annuals .
- 7. Brown, David E.; Minnich, Richard A. 1986. Fire and changes in creosote bush scrub of the western Sonoran Desert, California. American Midland Naturalist. 116(2): 411-422. 
- 24. Ludwig, J. A.; Cunningham, G. L.; Whitson, P. D. 1988. Distribution of annual plants in North American deserts. Journal of Arid Environments. 15: 221-227. 
- 26. Martin, Bradford D. 1984. Influence of slope aspect on postfire reproduction of Encelia farinosa (Asteraceae). Madrono. 31(3): 187-189. 
- 39. Turnage, William V.; Hinckley, Arthur L. 1938. Freezing weather in relation to plant distribution in the Sonoran Desert. Ecological Monographs. 8(2): 530-550. 
- 45. Westman, W. E.; O'Leary, J. F.; Malanson, G. P. 1981. The effects of fire intensity, aspect and substrate on post-fire growth of Californian coastal sage scrub. In: Margaris, N. S.; Mooney, H. A., eds. Components of productivity of Mediterranean climate regions--basic and applied aspects. The Hague, Netherlands: Dr W. Junk Pulishers: 151-179. 
- 51. Ehleringer, James. 1982. The influence of water stress and temperature on leaf pubescence development in Encelia farinosa. American Journal of Botany. 69(5): 670-675. 
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