Desert plant with the longest leaves

The wonder plant (Welwitschia mirabilis) of the Namib Desert in Namibia and Angola only produces two leaves, but they are far longer than those of any other species of desert plant, each one growing between 2-4 m long, though they eventually become split, or at least become shredded at their tips, due to the arid desert winds and harsh living conditions experienced in this environment. In contrast, the leaves of other desert plants are usually very small, to prevent water loss via evaporation.