The annual herb Achyrachaena mollis bears the common name blow-wives, which is both singular and plural. It is the only species in the monotypic genus Achyrachaena. It is a flower which grows to approximately one foot in height on a strong, straight stem. Atop the stem is a large, rounded bud which opens into a spherical cluster of flowers. The actual flowers are small and yellow and nearly invisible behind the showy fruits, which extend shiny bright white scales which look like long rectangular flower petals. These silky white scales catch the wind, which allows the single-seeded fruits to be dispersed.
The plant is common in low-elevation hills and grasslands all over California, and into southern Oregon and northern Baja California. Blow-wives has some invasive potential, but is not known as one of the more troublesome weeds.