Cneoridium is a monotypic genus in the citrus family which contains the single species C. dumosum, known by the common name bushrue. Propagating is typically by seed, but can also be accomplished by cutting.
is an evergreen shrub native to the coastal bluffs of Southern California and Baja California. This highly branched shrub may exceed a meter in height and sprawl about as wide. Its twigs are covered in small linear green leaves and flowers in clusters of one to three. Each flower is just over a centimeter wide with four or five rounded white petals and eight yellow-anthered white stamens.
The bunching fruits are round reddish-green berries about half a centimeter wide covered in a thin peel which is gland-pitted like that of common citrus fruit. Each berry contains one or two spherical seeds.