Solanum sandwicense is a rare species of flowering plant in the nightshade family known by the common names Hawai'i horsenettle[2] and popolo 'aiakeakua.

It is endemic to Hawaii, where it occurs today on the islands of Kauai and Oahu.

This plant is a shrub growing up to 5 meters tall with a stem up to 15 centimeters in diameter.

The leaves are oval, sometimes lobed, and measure up to 15 centimeters long by 14 wide.

The fruit is a juicy black spherical berry just over a centimeter wide.