manna lichen

例句：

1. 1. This rare species of lichen is known for its ability to purify the air.
   这种罕见的苔藓因其净化空气的能力而闻名。
2. 2. The manna lichen has been used in traditional medicine for centuries.
   这种甘露苔藓在传统医学中被使用了几个世纪。
3. 3.In the rainforest, manna lichen can grow on almost any surface, providing a natural habitat for many insects and small animals.
   在雨林中，甘露苔藓可以在几乎所有表面上生长，为许多昆虫和小动物提供了自然栖息地。