mossy       
adjective uk/ˈmɒs.i/ us/ˈmɑː.si/
 覆盖着苔藓的
covered with moss (= a small plant that grows in wet places)
  a mossy tree/rock/lawn 覆盖着苔藓的树/岩石/草坪 
 They sat together on the mossy tree-trunk. 他们一起坐在长满青苔的树干上。 
 See: moss
 - More examples
- Already the temple was a half-buried heap of mossy stones.
- Wild garlic grows in shady places along the banks of streams and in undisturbed mossy woodland.
- She fell back hard onto the green mossy ground.