Solanum incompletum is a rare species of flowering plant in the nightshade family known by the common names thorny popolo and popolo ku mai. It is endemic to Hawaii, where it occurs today on the islands of Maui, Lanai, and Hawaii. It is threatened by the destruction and degradation of its habitat. It is a federally listed endangered species of the United States.This plant is a shrub growing up to 3 meters tall.