Varga Plant

Varga Plants are a highly-dangerous species of assimilating flora from the planet Skaro, sometimes employed by the Daleks in their intergalactic conquests.

Biology
Described as part animal, part vegetable; Varga Plants are cactus-like in appearance, covered in long white filaments with sharp thorns interspersed in them. They can move around slowly in search of prey, using their roots to drag themselves over the jungle ground. Their thorns deliver a powerful toxin that takes over the minds of other creatures, giving them an instinctive desire to kill; before taking over their cells and slowly transforming them into Varga Plants as well.

Appearances

 * Doctor Who, season 3, "Mission to the Unknown" (1965)
 * Doctor Who, season 3, "The Daleks' Master Plan" (1965)