There is presented herein information on various species of Southern California plants, giving largely distributional notes and ecological data. It supplements material given in Dr. Jepson's Flora of California (Parts 1-7, 1909-1922) and lists plants omitted from the papers on the San Jacinto Mts. (Hall, Univ. Cal. Pub. Bot. 1:1-140, 1902), San Bernardino Mts. (Parish, PI. World 20:163-178, 208-223, 245-259, 1917), and San Antonio Mts. (Johnston, PI. World 22:71-90 & 105-122, 1919).