colleterium

例句：

1. 1. The lichens on the rocks are a natural wonder of the area.
   岩石上的地衣是该地区的天然奇观。
2. 2. Lichens play an important role in maintaining the health of forest ecosystems.
   地衣在维护森林生态系统健康方面起着重要作用。
3. 3. The lichenologist is responsible for studying the life cycle and growth patterns of lichens.
   地衣学家负责研究地衣的生长周期和模式。