苏铁纲

[ noun ]
palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta)
<noun.plant>

Cycadophyta \Cycadophyta\, Cycadophytina \Cycadophytina\,
Cycadopsida \Cycadopsida\n.
a class or subdivision of plants comprising palmlike
gymnosperms: it includes the surviving order {Cycadales} and
several extinct orders; possibly not a natural group; in some
systems considered a class (Cycadopsida) and in others a
subdivision (Cycadophytina or Cycadophyta).

Syn: class Cycadopsida, subdivision Cycadophytina,
subdivision Cycadophyta.
[WordNet 1.5]