Use this tag when a flower (or a bunch of flowers) grows on top of a character's head, usually with a stem and a set of leaves. The Pikmins from the eponymous series are examples of this tag.
In anime and manga, a flower growing from a character’s head is sometimes an allusion to the Japanese term 脳内お花畑 (nōnai o-hanabatake) - literally "garden in the brain" - symbolizing that a character is being carefree, happy-go-lucky, silly, or stupid. Examples of this would be Kaguya in her “bakaguya”/moron mode and Pallas from Arknights.
Not to be confused with hair flower.
This tag implicates flower (learn more).