資料來源 : WordNet®
division Gymnospermophyta
n : plants having naked seeds not enclosed in 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); in some classifications the
Coniferophytina are divided into three groups:
Pinophytina (class Pinopsida) and Ginkgophytina (class
Ginkgopsida) and Taxophytina (class Taxopsida) [syn: {Gymnospermae},
{class Gymnospermae}, {Gymnospermophyta}]