This list of fictional plants describes invented plants that appear in works of fiction.
The following plants appear in the David Attenborough sketch of the last Monty Python episode.
Plants in Pandora have evolved according to the characteristics of their environment, which has an atmosphere that is thicker than on Earth, with higher concentrations of carbon dioxide, xenon and hydrogen sulfide. Gravity is weaker in Pandora, thereby giving rise to gigantism. There is a strong magnetic field, causing plants to develop 'magnetotropism'. A particularly intriguing quality of flora and fauna in Pandora is their ability to communicate with each other. This is explained in the movie as a phenomenon called 'signal transduction', pertaining to how plants perceive a signal and respond to it.
Lufwood: ash-grey and very tall tree, with a straight trunk devoid of many branches up until the canopy, from The Edge Chronicles series of books by Paul Stewart and Chris Riddell
The Black Mercy is an extraterrestrial hallucinogenic plant used a weapon by the supervillain Mongul. Mongul first uses it in "For the Man Who Has Everything", a story by Alan Moore and Dave Gibbons that was first published in Superman Annual #11 (1985) and later adapted into the August 7, 2004 Justice League Unlimited episode of the same name. Described in the original story by Mongul as "something between a plant and an intelligent fungus", the Black Mercy attaches itself to its victims in a form of symbiosis, and feeds from the victim's "bio-aura". The organism is telepathic, and reads its victim's heart's desire, giving them a logical simulation and an ending that the victim wants, which the victim experiences an entirely immersive, virtual experience in which their actual surroundings are masked to them. According to Mongul, victims are capable of "shrugging off" the hallucination, though some find the experience too compelling too do so unaided.