Emerald

This florescent green and yellow moss is commonly found growing in giant clumps On rotten logs.
It is massive, growing up to 1.4 feet (43 cm) tall. It forms in sparse patches and they are slow to spread and grow, and is very strong.
When mature, emerald oblong capsules grow at the end of long, lime green sporophytes, eventually opening up during the early autumn to release dozens of spores; it can cause allergic reactions.