Emerald

This lime moss is commonly found growing in large clumps In heathlands, and On trees.
It is small, growing up to 1 inch (3 cm) tall. It forms in large clumps, and is very strong.
When mature, emerald oval-shaped capsules grow at the end of short, lime green sporophytes, eventually opening up during the late summer to release dozens of spores; it can cause severe allergic reactions.