Plant Monsters

Plant Monsters are plants that have been invented for fiction, and do not exist in real life. Most fictional plant monsters are a version of the Venus flytrap, a carnivorous plant that catches and digests animal prey (mostly insects and arachnids).

Influence for Venus
The triffids were mobile carnivorous plants seen in Day of the Triffids, a book by John Wyndham, and several film adaptions of the same name. They are described as having no nervous system, therefore quite unintelligent and acting only on instinct.

Another prominent influence is the Venus flytrap Audrey II from Little Shop of Horrors, a comedy horror film originally released by Roger Corman in the 1950s, followed by the more well-known musical remake in the 1980s. Audrey II was discovered after a total solar ecplise by Seymore Krelborn, a guy that can't seem to catch a break. He convinces his boss to use the plant (who he named after his crush) to attract customers to the flower shop. It works immediately. However, Audrey II doesn't do so well and begins to wilt. Seymore tries to revive Audrey II and discovers the plant needs fresh blood. With Audrey II healthy and growing the flower shop and Seymore boom in popularity. When Seymore can't use his own blood to feed Audrey II, Audrey II reveals it can speak and demands more food. Seymore complies until he realizes Audrey II is actually from outer space here to conquer Earth by breeding copies of itself and brainwashing the inhabitants with some sort of psychic control.

Since Monster High has such a high influence from Greek mythology, there's the presence of Dryads, or tree nymphs. They were said to be beautiful maidens who were spiritually attached to a tree, to which they shared a life-force.

Venus Flytrap
The Venus Flytrap is a small plant whose structure can be described as a rosette of four to seven leaves, which arise from a short subterranean stem that is actually a bulb-like object. Each stem reaches a maximum size of about three to ten centimeters, depending on the time of year; longer leaves with robust traps are usually formed after flowering. Flytraps that have more than 7 leaves are colonies formed by rosettes that have divided beneath the ground.

The leaf blade is divided into two regions: a flat, heart-shaped photosynthesis-capable petiole, and a pair of terminal lobes hinged at the midrib, forming the trap which is the true leaf. The upper surface of these lobes contains red anthocyanin pigments and its edges secrete mucilage. The lobes exhibit rapid plant movements, snapping shut when stimulated by prey. The trapping mechanism is tripped when prey contacts one of the three hair-like trichomes that are found on the upper surface of each of the lobes. The trapping mechanism is so specialized that it can distinguish between living prey and non-prey stimuli such as falling raindrops; two trigger hairs must be touched in succession within 20 seconds of each other or one hair touched twice in rapid succession, whereupon the lobes of the trap will snap shut in about one-tenth of a second. The edges of the lobes are fringed by stiff hair-like protrusions or cilia, which mesh together and prevent large prey from escaping. (These protrusions, and the trigger hairs, also known as sensitive hairs, are probably homologous with the tentacles found in this plant’s close relatives, the sundews.) Scientists are currently unsure about the evolutionary history of the Venus flytrap; however scientists have made hypotheses that the flytrap evolved from Drosera (sundews).

The holes in the meshwork allow small prey to escape, presumably because the benefit that would be obtained from them would be less than the cost of digesting them. If the prey is too small and escapes, the trap will reopen within 12 hours. If the prey moves around in the trap, it tightens and digestion begins more quickly.

Speed of closing can vary depending on the amount of humidity, light, size of prey, and general growing conditions. The speed with which traps close can be used as an indicator of a plant's general health. Venus Flytraps are not as humidity-dependent as are some other carnivorous plants, such as Nepenthes, Cephalotus, most Heliamphora, and some Drosera.

The Venus Flytrap exhibits variations in petiole shape and length and whether the leaf lies flat on the ground or extends up at an angle of about 40–60 degrees. The four major forms are: 'typica', the most common, with broad decumbent petioles; 'erecta', with leaves at a 45-degree angle; 'linearis', with narrow petioles and leaves at 45 degrees; and 'filiformis', with extremely narrow or linear petioles. Except for 'filiformis', all of these can be stages in leaf production of any plant depending on season (decumbent in summer versus short versus semi-erect in spring), length of photoperiod (long petioles in spring versus short in summer), and intensity of light (wide petioles in low light intensity versus narrow in brighter light).

When grown from seed, plants take around four to five years to reach maturity and will live for 20 to 30 years if cultivated in the right conditions. Its trapping structure is formed by the terminal portion of each of the plant's leaves and is triggered by tiny hairs on their inner surfaces. When an insect or spider crawling along the leaves contacts a hair, the trap closes if a different hair is contacted within twenty seconds of the first strike. The requirement of redundant triggering in this mechanism serves as a safeguard against a waste of energy in trapping objects with no nutritional value.

Poison Ivy
Poison Ivy (Dr. Pamela Lillian Isley) is a fictional character, a DC Comics supervillainess who is primarily an enemy of Batman. Created by Robert Kanigher and Sheldon Moldoff, she first appeared in Batman #181 (June 1966).

Poison Ivy is depicted as one of the world's most prominent eco-terrorists. She is obsessed with plants, botany, and environmentalism. She uses toxins from plants and mind controlling pheromones for her criminal activities, which are usually aimed at protecting the natural environment. Fellow villain Harley Quinn is her recurring partner-in-crime and possibly her only human friend. She is best known as a villain of Batman and plays an important role in his rogues gallery and has proven to be one of his more powerful foes, being one of the few Batman villains to display anything close to superpowers. Pamela Isley a.k.a. Poison Ivy has been portrayed as a love interest for Batman in some comics. In one comic, Ivy was robbing a charity gala Bruce Wayne was attending. Ivy's first kiss was poison, the second its antidote. When they first meet, Ivy's toxic lips planted a seed of toxic rapture in Bruce. But when she later kissed a dying Dark Knight, Ivy unknowingly cured her intended victim and established a budding romantic tension between them.

Creator Robert Kanigher modeled Poison Ivy after Bettie Page, giving her the same haircut and Southern drawl as Page. In her first appearances in 1966, no origin was developed; she was merely a temptress. At her first appearance, her costume was a one-piece, strapless green bathing suit, covered with leaves. Leaves also formed her bracelets, necklace and crown. She also wore green high heels and yellow-green nylon stockings with leaves painted on them. These particulars changed somewhat when she re-appeared. Later on in the 1986 series of the Batman comics, she wore only a few vines to cover up a small amount of her breasts.

Poison Ivy was promoted after the rise of feminism brought the need for a greater number of more independent female villains in the series. She was also used to replace the increasingly sympathetic Catwoman as a clearly antagonistic female supervillain foil for Batman, and then made further appearances in the Batman comic book series and in Suicide Squad. An origin story was later created for her by Neil Gaiman, tying her in to Swamp Thing and his original Black Orchid as a human-plant hybrid. She has since appeared in starring roles in Gotham City Sirens and Birds of Prey.

In the 1997 film, Batman & Robin, she was portrayed by Uma Thurman. Poison Ivy has been featured in the television series, Batman: The Animated Series and The Batman, by voice actresses Diane Pershing and Piera Coppola respectively.

IGN's list of the Top 100 Comic Book Villains of All Time ranked Poison Ivy as #64. She was ranked 21st in Comics Buyer's Guide's "100 Sexiest Women in Comics" list.