A seed plant, such as a cycad or
conifer, whose seeds are naked and not enclosed
within an ovary .
In some systems considered a class (Gymnospermae)
and in others a division (Gymnospermophyta);
comprises three subdivisions (or classes):
Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida)
and Coniferophytina (class Coniferopsida);
