Flowers appear in Kingdom Hearts and Kingdom Hearts: Chain of Memories, taking residence within the Lotus Forest in Wonderland. They are giant, talking plants who reward people for using items, such as Potions or Ethers, on them. All flowers, except the one that can enlarge people, can only take and give once, after which they merely chat with Sora.
Several flowers appear in Lotus Forest and ask Sora to give them items. While most repay Sora with other items, one flower enlarges him, similar to the effect of drinking the potion in the Bizarre Room. Sora's enlargement allows him to progress further through Wonderland and obtain the Claw Marks evidence, which is needed to help prove Alice's innocence at her trial.
Later on, after Alice goes missing at her trial, a flower is seen opening its petals and then shooting a boulder out onto the ground nearby, at which the Cheshire Cat appears on top of it.
Kingdom Hearts: Chain of Memories
Flowers reappear within the version of Wonderland crafted by Sora's memories, and can be attacked to cause them to drop HP or MP prizes.
In Kingdom Hearts, different flowers are found in fixed locations.
Flowers are, true to their name, giant flowers with thick, green shoots and leaves. Some flowers have red petals while others have yellow petals. Usually, their petals are closed into a bud. However, they bloom when they are given their desired item.
Not much is known about the flowers as they play a small role in the game. However, it is known that they are often grateful to those who satisfy them. The flowers are all part of the same community and they make friendships between each other. They are shown to have a certain level of thinking and intelligence as they frequently make remarks and observations about the world around them. Also, they are extremely mysterious, for example, one flower has a strange "power" to enlarge people.
The flowers that appear in Wonderland debuted in Disney's 1951 animated feature, Alice and Wonderland. As in Kingdom Hearts, they have the ability to talk and are insignificant to the film's overall plot.