Emerald

This lime moss is commonly found growing in tiny clumps On trees, In moorlands, and In heathlands.
It is small, growing up to 1 inch (3 cm) tall. It forms in small clumps, and is extremely frail.
When mature, emerald spiral capsules grow at the end of long, lime green sporophytes, eventually opening up during the early winter to release millions of spores; it can cause severe allergic reactions.