- This is by far the most remarkable member of the Gnetales, both as regards habit and the form of its flowers.
Gnetales: Hooker, " On Welwitschia mirabilis," Trans.
The Gnetales are a class apart, including three living genera, of which we know next to nothing as regards their past history or line of descent.
Although there are several morphological features in the three genera of Gnetales which might seem to bring them into line with the Angiosperms, it is usual to regard these resemblances as parallel developments along distinct lines rather than to interpret them as evidence of direct relationship.
Flowers unisexual, except in a few cases (Gnetales) without a perianth.