Riverfruit
Riverfruit was the name given to a form of plant life native to the planet Alzarius in E-Space. Riverfruit resembled an Earth watermelon. It appeared to be part of the staple diet of the Alzarians, who apparently farmed it as a crop. They are a dark green colour on the exterior while the interior is dark yellow.
The Alzarians considered riverfruit theft a relatively serious offence. The outlaws led by Varsh stole a number of the fruit from a pile near a river. Adric attempted also to steal some but was spotted and dropped them to leave.
Before and during Mistfall, Alzarian spider eggs appeared within riverfruit. These would rapidly develop until the fruit split open and released the adult spider. (DW: Full Circle)
- Given this development and the accepted link between the Alzarian spider, the Marshman, and the Alzarian humanoids, it is reasonable to assume riverfruit also contains the same unusual cellular characteristics as the descendant organisms.
While aboard the Urbankan mothership, Adric had mistaken an Avocado pear for a small riverfruit. (DW: Four to Doomsday)