self-watering plants

The Desert Rhubarb can hold 16 times more water than its rivals and has developed a unique ability to effectively water itself in its barren habitat. Researchers were confounded by the metre-wide plant's giant leaves, compared to its desert counterparts, whose tiny leaves stop dangerous moisture loss. But they found the plant's large leaves are the key to its success, because they are covered in microscopic streams through which water can be channeled.