Emerald

This gray-green moss is commonly found blanketing giant areas On trees, In heathlands, and In rainy mountain ranges.
It is short, growing up to 2 inches (5 cm) tall. It forms in thin clumps, and is overwhelmingly flimsy.
When mature, emerald triangular capsules grow at the end of elongated, lime green sporophytes, eventually opening up during the mid-autumn to release thousands of spores.