Wolf Apple

From Freepedia

Also known as Solanum lycocarpum, the Wolf Apple is common in the Brazilian savanna. The plants range in height from four to ten feet. The fruit harvested from this plant is yellow in color and resembles a medium sized tomato. This fruit makes up 50% of Maned Wolf's diet.

References:

MOTIDOME M, ME LEEKNING & OR GOTTLIEB (1970) A quimica de Solanaceas brasileiras. 1 - A presenca de solamargina e de solasonina no jua e na lobeira. Annales de la Academia Brasilica des Ciences 42: 375-376.

Trade Winds Fruit

http://www.tradewindsfruit.com/fruit_for_wolves.htm

Dave's Garden

http://davesgarden.com/pf/go/58603/