
Researchers from Israel's University of Haifa-Oranim have managed to decipher the unique self-watering mechanism of the desert rhubarb plant in the Negev desert. The gist:
...the plant's leaves channel rainwater toward the ground surrounding the rhubarb plant's root.
The leaves are also coated with wax, which helps to quicken the water flow toward the sunken parts of the leaves and from there to the root. Most neighboring plants simply survive on the rain droplets that directly penetrate the ground around them.
Coincidentally, Israel is where the modern drip irrigation methods were invented, although the theory was first put in practice in Afghanistan in 1866, so says Wikipedia.
[via LiveScience.com]
[pics via University of Haifa]