Ranges from southwest San Diego County to Baja California .
Known Populations in San Diego County
Occurrences found in MU2 (Switzer Canyon, Florida Canyon, Rancho Mission Park, Chollas), MU3 (San Diego National Wildlife Refuge, Sweetwater Resrvoir Open Space, City of Chula Vista Central City Preserve, MU4 (Sabre Springs), and MU6 (Los Penasquitos Canyon Preserve,Del Mar Mesa Open Space, Lusardi Creek Preserve, Black Mountain Open Space Park).
Primary habitat associations in chaparral, coastal sage scrub, and valley and foothill grassland communities [1,2]. Often found in clay soils [1,3].
Taxonomy and genetics
In the Rhamnacaea family .
Life history demography
A perennial deciduous shrub .
Blooms from December to May [1,2].
Pollination seed dispersal
Threatened by urbanization, road construction, nonnative plants, development, and grazing .
California adolphia sources
 California Native Plant Society, Rare Plant Program. 2017. Inventory of Rare and Endangered Plants of California (online edition, v8-03 0.39). Website http://www.rareplants.cnps.org [accessed 27 September 2017]
 Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.