During these last 5 years six somatic mutations were found in commercial varieties of sweet potatoes grown in experimental fields of the Roots and Tubers Dept. of the Insiitvto Agronômico de Campinas. All these mutations affected the color of various root layers and their descriptions are presented in this paper. In variety 98-Caslelo the purple periderm became cream in the mutated form while in the variety 18-Dahomey the purple color of periderm and cortex have been changed to purple-reddish and cream respectively. The mutation in var. 39-Roxa pilosa affected the periderm color, which changed from dark-purple to light copper and the cortex and central cylinder from dark-purple to cream color. In the variety 104-Peçanha rosa which possesses a rose-brown periderm the mutation produced a red-purplish periderm. In the seedling 104-S50-6 the dark-purple periderm became cream while in the mutated form of the 113 S50-11 seedling the yellowish periderm was changed to light-purple and the yellow cortex and central cylinder became purple. Attention has been called to the root flesh color of the seedling 113 S50-11 which is unique in the collection of sweet potatoes types at Campinas. Only the mutations that ocurred in varieties 98-Castelo and 18-Dahomey have been tested for yield dining these last two years. It has been found that both new types are similar in yield capacity to the original varieties and can be considered as very promissing types of sweet potatoes.