Wild Tomato (Solanum sisymbriifolium)

Family Solanaceae

This is makes a thick, sprawling bush which grows to about 1m (3’) in height

 It is an invasive plant on which a leaf-feeding tortoise beetle has been released to act as a bio-control agent.

 It is not edible except for the seeds which are eaten by birds. 

Identification from: http://www.ispot.org.za