Several hundred shrubs grow south of Del Mar Heights Road and east of El Camino Real in a vestigial stand of chaparral not yet developed. Herbarium specimens at SD are for the bluffs south of Del Mar Heights School, on the west side of Lux Canyon in Cardiff, 0.8 km west southwest of Alga Road southeast of Carlsbad, south of Encinitas Boulevard and west of Manchester Avenue in Encinitas, and 0.1 km east of El Camino Real and 0.6 km south of Palomar Airport. Reports are from a canyon drainage on the western slopes of Carmel Mountain, and east of Rancho Santa Fe Road near Avenida La Posta. It is also recorded on the north slope of the southern peak of Cerro Jesus Maria, on a ridge 4 miles east of Cerro Coronel, and as abundant on Cerro del Coronel. This substantial shrub is slowly declining in San Diego County as infilling occurs in residential areas from Torrey Pines and Del Mar north to Encinitas.
Primary impacts are due to urban expansion.
Isolated, individual shrubs should be placed into biological open space whenever possible. Copyright May 1994 Craig H. Reiser.