Ocotillo

This Nether berry bush is very thorny.  Normally it will look like dead thorny sticks.

When berries are present they will appear as colored tips on the end of each stick and a few leaves would be present.  This bush would be three blocks tall and would produce bitter berries.  This plant would be a rare spawn in the Nether. It would cause thorn damage if touched and possibly to pick the berries. The berries would cause poisoning if eaten but can be used to brew Wither Potion.