This lichen is fruticose, with very long stems and short, even side branches. It is considered the longest lichen in the world. The stems are usually 6 to 12 inches in length but are sometimes much longer. It is pale green to silvery-yellow. It has a distinct central cord, which is white. It may grow to be 20 feet in length. It predominantly reproduces asexually through fragmentation. Spore-producing structures are rarely observed. It can double its length each year.
