The immortal moss
Compared to the plants you might grow in your garden, mosses are very simple. As part of a group called Bryophytes, they don’t have roots or flowers and their leaves are often only one cell thick. Their simplicity is their strength; in dry conditions, they don’t wilt, but completely dry out. Some will stay like this for years until they are revived again by water. Mosses are so resilient that they can be found on every continent including Antarctica.