Many insects produce abnormal growths on plant leaf surfaces. This study investigates the differential distribution of gall on Protium heptaphyllum in a resyinga of southeastern Brazil. The number of galls per leaf was counted on fourteen individuals and it was found statiscal differences in gall distributions among and within individuals. The results suggest that distribution of glls may be due to differential susceptibility of P. heptaphyllum to galling insects, which is consistent with the plant genetic mosaic hypothesis.
