During the spring flush of growth both vegetative shoots and inflorescences are formed in Citrus. Some of these inflorescences bear both flowers and leaves (GOLDSCHMIDT and MONSELISE 1972). The leaves from leafy inflorescences are smaller in size (GUARDIOLA et al. 1984) and differ in composition, both organic (SANZ et al. 1987b) and mineral (EMBLETON et al. 1973) as compared to leaves from vegetative sprouts. Some of these differences are related to the competition of nearby developing flowers and fruitlets, but a different type of regulation may also be involved. Early removal of developing reproductive organs had no effect on leaf growth (SANZ et al. 1987a). Further, inflorescence leaves show during June drop a transient accumulation of starch. This accumulation cannot be explained by a source-sink relationship, and was prevented by removal of the developing fruitlet (SANZ et al. 1987b). Since the effect of the developing fruitlets on starch accumulation could be mimicked by GA3 application, involvement of hormonal regulation was suggested (SANZ et al. 1987a). To prove this hypothesis, GA-like activity in vegetative and inflorescence leaves was measured from leaf expansion until the end of June drop, and the effect of fruitlet removal on GA levels in leaves was determined. These GA-levels have been related to differences in leaf growth and in the accumulation of carbohydrates in leaves.