裸子植物

Most angiosperm ovules possess two integuments, while gymnosperms usually have only one.

大多数被子植物的胚珠有两层珠被， 而裸子植物通常只有一层。

The female gametophyte is reduced, but larger than in angiosperms; it is not autotrophic.

裸子植物的雌配子体简化， 但较被子植物体的体积大， 不能自养。

Meanwhile, the species areal - types of Guangdong Gymnospermae were divided into 20 subtypes in this paper.

同时论文还将广东裸子植物种的分布区类型划分为20个亚型。

Many modern genera of conifers arose in the Tertiary, but other gymnosperms declined.

许多现代的松属植物是在第三纪产生的， 然而其他的裸子植物开始衰落。

Gymnosperm A general term for any seed plant except the angiosperms, characterized by bearing naked seeds.

裸子植物：被子植物以外的种子植物统称裸子植物， 以种子裸露为特征。