种子蕨类植物包括树状类型的植物。
The seed ferns included treelike forms .
石炭纪的葱翠的沼泽地正在慢慢被针叶林、种子蕨类以及其他抗干旱植物所代替。
The lush swamp forests of the Carboniferous were gradually replaced by conifers , seed ferns , and other drought-resistant plants .
种子蕨类