Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Brittlebush" Definition
noun
A shrub (Encelia farinosa) in the composite family, native to Mexico and the southwest United States and having grayish foliage and showy flower heads with yellow rays.
Source: American Heritage Dictionary
Any of a genus () of composite plants having stems.
Source: Merriam-Webster
A perennial desert shrub () of the southwestern United States and adjacent Mexico with yellow flowers blooming above dense usually grayish-green foliage.
Source: Merriam-Webster
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