白藓

例句：

1. 1. The white lichen on the rock wall is a beautiful sight.
   岩石墙上的白色藓类植物是一道美丽的风景。
2. 2. Lichens are known for their ability to survive in extreme conditions.
   藓类植物因其能在极端条件下生存而闻名。
3. 3. The lichens on the forest floor provide important nutrients for the trees.
   森林地面上的藓类为树木提供了重要的养分。