The work on which this paper is based was done in 1921 and gave evidence for justification of the position taken by Eaton (1879) in dividing P. californicum into two varieties: a coastal one with coriaceous leaves, var. Kaulfussii, and a more common one with thinner leaves and extending from the coast inland, var. intermedium. In 1922 Fernald transferred these to varietal rank under P. vulgare. While the work herein reported was under way, it seemed as if some such final disposition would be desirable, but it still seems worth while to put on record more detailed figures and measurements for Californian material than have heretofore been available. The work was carried on under the direction of'Dr. Philip A. Munz of Pomona College, to whom I express deep gratitude for his helpful supervision and encouragement. Material was collected in many inland localities centering about the Pomona Valley of Southern California and in the coastal region at San Diego and Laguna Beach. In all, 174 specimens were collected, 50 of these being of the Kaulfussii type. Additional material was available in the Baker Herbarium of Pomona College and from the Herbarium of the University of California.