Answer:
Welwitschia has remarkable features.
Discussion:
There are more remarkable features that make welwitschia so difficult to categorise. Unlike any other plant, the apical growth point of the stem stops growing from an early stage. This causes the stem to grow upwards and outwards, away from the original apex (which remains dead), resulting in the characteristic obconical shape. In older specimens, continued growth results in the undulating of the stem margin.