Emerald

This gray-green moss is commonly found blanketing tiny areas On trees, In moorlands, and In rainy mountain ranges.
It is small, growing up to 3 inches (8 cm) tall. It forms in thin clumps, and is extremely light.
When mature, emerald V-shaped capsules grow at the end of short, lime green sporophytes, eventually opening up during the late autumn to release dozens of spores; it can cause allergic reactions.