Emerald

This lime or silver moss is commonly found growing in tiny clumps In rainy mountain ranges, On trees, and In moorlands.
It is enormous, growing up to 1.3 feet (41 cm) tall. It forms in extensive patches and they are exceptionally hardy, and is extremely rigid.
When mature, emerald heart-shaped capsules grow at the end of elongated, lime green sporophytes, eventually opening up during the late autumn to release thousands of spores.