羊齿类

例句：

1. 1.The study of plant fossils is an important branch of paleontology.
   植物化石的研究是古生物学的一个重要分支。
2. 2. The forest was covered in a thick layer of mosses and ferns.
   森林里覆盖着厚厚的一层苔藓和蕨类植物。
3. 3. The leaves of this plant are reminiscent of those found in ferns, with their delicate texture and intricate patterns.
   这种植物的叶子与蕨类植物的叶子相似，具有细腻的质地和复杂的图案。