Fantastic Flora

In real life, plants are important in nature. They provide oxygen, pollen for bees, food for herbivores and they make your garden look nice.

However, fantasy/sci-fi writers like to create their own unique plants with bizarre appearances and properties. Some may be carnivorous, fast-growing, even sentient. Some may be explosive, springy or maybe fiery.

You get the idea. They're very strange plants. They may or may not be just magic. Usually found on alien planets or in other dimensions. If someone can control these things watch out.

A Super-Trope to Fantastic Fruits and Vegetables, which is when the Fantastic Flora is edible.

Examples of Fantastic Flora include:

Anime and Manga

In One Piece:
- The IQ plants, which stimulate evolution in animals that eat it. Dr Indigo used them to create SIQ.
- Some of Usopp's Pop Greens become very bizarre plants such as a bush that grows into a wolf and the bulb releases a 3 meter diameter shock wave.

Literature

The Voynich manuscript has many pictures of plants, none of which have been identified.
Possibly in imitation of the Voynich manuscript, the Codex Seraphinianus also includes in its incomprehensible contents a chapter of bizarre and improbable plant life.
Clark Ashton Smith loved this trope. Many of his stories feature it prominently.
Edward Lear's 1888 book Nonsense Botany features such plants as the Bottlephorkia spoonifolia and the Manypeeplia upsidownia.

Video Games

Super Mario Wonder is a game with a flower-theme; it takes place in the Flower Kingdom, talking flowers are everywhere, the Quest Giver is Prince Florian (a Wiggler-like NPC with flowers on his head) and the collectibles are called Wonder Seeds. Clearly Princess Daisy feels right at home.

Western Animation

From My Little Pony Friendship Is Magic:
- Poison Joke which causes humorous afflictions on those who come in contact with it.
- Zap Apples which only grow during a lightning storm and are used to make Zap Apple Jam.