Plantwatch: goblin’s gold luminous moss continues to captivate

Schistostega pennata can grow into huge colonies in the dark and carpet caves in glowing green light

There are caves where ethereal golden-green lights glow on the ground like emeralds. These light displays are from a luminous moss called Schistostega pennata, known as goblin's gold, a name that conjures up legends of cave-dwelling creatures. But in daylight, the magical green glow vanishes.

The moss is superbly adapted to life in the dark. When its spores germinate they grow filaments that fan out, scavenging for any faint light they can find. Cells on the surface of the moss are covered with tiny lenses that focus any dim light deep down into the bottom of the cells where chloroplasts move around to harvest any pinpricks of light.