Genshin Impact is filled with all manner of different recourses that you will need to gather up for various reasons. You may need them for quests, to ascend weapons or characters, or for crafting. One of the many different types of plants in Genshin Impact is the Mist Flower Corolla. This icy plant will grow just about anywhere, but can often be found near bodies of water. When you first find this flour you won’t be able to harvest it, and it will actually do cold damage to you if you get too close.
You will need to hit the flower with a Pyro ability to thaw it out, and only then will you be able to add it to your inventory.
A very good place to harvest them is at the Dawn Winery in the southwest of Mondstadt. This area is, unsurprisingly, known for wine, but they also have plenty of ice creatures and ice plants around, including the Mist Flower Corolla. On the banks of the lakes and rivers in this area, you will find plenty of Mist Flowers growing.
The main thing to keep in mind for all these games is to gather up these items as you find them. If you see a new type of plant in the world, figure out exactly how to harvest it and then add it to your invetory. This will save you a lot of time when the game hits you with a fetch quest like this.
For more exact locations, you can find various Mist Flower Corolla locations marked by the blue player icon on the maps below.