Purple Flower Platform
From the Super Mario Wiki
Purple Flower Platforms are giant plants that appear in Donkey Kong Country: Tropical Freeze. Their structure features a thin, perfectly upright stem sustaining a crimson flower which faces the sky. The flower is broad and serves as temporary platform. Baobab Bonanza, a level from the game, is the only one in which Purple Flower Platforms are present. Here, they mostly help the Kongs pass wide abysses; however, as their height differs from one to another, they might serve as steps used to reach a higher ground.
Even though the Kongs are able to step on the flower, they can only do so for a limited time. Their weight can make the plant lean until it reaches a certain limit. Should the Kongs continue to stand on the plant, it wilts and drops them off, after which it goes back to its initial position and regenerates. Mushroom Platforms from World 4-2 of New Super Mario Bros. act similarly.