Fire aids in this by burning the clutter on the forest floor away. Trees found in this category include Red Pine, White Pine, Hemlock, and Jack Pine. Jack Pine is serotinous, or has closed cones. These cones do not open until they are exposed to fire. By holding on to its dead branches, it encourages fire.
Welwitschia is found in the deserts in Africa.
They have short but wide stems and only two wide leaves.