星茄（学名：Solanum seaforthianum），又名南青杞，为茄科茄属下的一个种。

Solanum seaforthianum, the Brazilian nightshade, is a flowering evergreen vine of the Solanum family native to tropical South America. As a member of the Solanum genus, it is related to such plants as the tomato and potato. It is characterized by clusters of four to seven leaves and can climb to a height of 20 ft (6 m) given enough room. It blooms in the mid to late summer with clusters of star-shaped purple inflorescence followed by scarlet marble-sized berries. The plant is highly heat resistant, but cannot tolerate frost conditions. The plant contains modest amounts of various tropane alkaloids such as atropine, scopolamine and hyoscyamine and should be considered mildly toxic and inedible.