A morphological study was made of the terminal and lateral buds of the Lula and Nabal avocados collected during the winters of 1940-41 and 1941-42 at Orlando, Fla., and from the same vars. at Homestead, Fla., during the winter of 1941-42. In these vars. floral differentiation began with the development of the proximal secondary axes in late Oct. or Nov. and continued over a period of months during that part of the winter when leaf formation and growth did not take place or were at a minimum. There was a year-to-year variation in the time of this development for a given var. and between vars. as well as between different trees of the same var. in different sections. The first identifiable flowers appeared on the lowest inflorescences in the Jan. buds of both vars. in the Orlando district and of the Lula var. in the Homestead district, but in the Nabal var. at Homestead they had not yet appeared in early March. Differentiation proceeded distally during the winter and in the most distal secondary axes it was completed just prior to or during expansion of the bud. Development into complete bloom was not interrupted by a dormant period between the time of initiation and differentiation and its expansion in the spring.