graphis script lichen with markings like ancient handwriting on bark
- Size
- Width: 2–10 cm
- Lifespan
- 10–50 years
- Diet
- Grows on smooth bark of trees in damp, undisturbed forests. Requires clean air, stable bark surfaces, and high humidity. Tolerates shade and moisture but cannot survive prolonged drought. Prefers smooth bark of beech and podocarp trees.
- Habitat
- Grows on the smooth bark of trees throughout New Zealand, particularly on native trees in damp, undisturbed forests. A creature of the bark, the trunk, the places where the tree is old and the air is clean. Found from sea level to the montane zone, in humid, sheltered locations where the bark is smooth and the moss grows thin. The lichen of the fine script, the one that looks like someone tried to write on the bark and gave up.
- Range
- Found throughout the North and South Islands on smooth bark of beech and podocarp trees in damp, undisturbed forests. Most common in the South Island's beech forests and the North Island's western ranges. Also found in temperate regions worldwide.
- Endemism
- Native
- Main Threats
- None significant. This species is common and widespread in damp, undisturbed forests. Localised threats include forest clearance, air pollution, and removal of old trees with smooth bark.
- Population
- Not Threatened. This is a common and widespread lichen in New Zealand, particularly on the smooth bark of beech and podocarp trees in native forests. It grows on native and introduced trees.
- Conservation Status
- Not Threatened
The one that looks like tiny writing has a body that is a thin, crusty layer that grows on the surface of the bark, forming a pale greyish-white patch. But the most distinctive feature is the fine, black, branching lines that cover the surface. These lines look exactly like handwriting, like someone tried to write a message on the tree with a very fine pen and then gave up halfway through. It is the lichen of the unfinished letter, the one that looks like a secret message waiting to be read.
What makes it special is the lines. The graphis script lichen is one of the most distinctive lichens in New Zealand. Its surface is covered in fine, black, branching lines called lirellae. The lirellae are the spore-producing structures of the lichen, and they look exactly like written script. The lines are thin and delicate, often forked or curved, forming patterns that look like letters, words, or maps. It is the lichen of the hidden message, the one that looks like it has something to say, the one that makes you lean in closer to try to read it.
The graphis script lichen is a crustose lichen, meaning it grows flat on the bark, like a crust of paint, rather than upright or leafy. Its body is a smooth or slightly cracked crust, pale greyish-white, often with a greenish tint. The lirellae are embedded in the crust, sometimes raised slightly above the surface. Under a hand lens, the lirellae look like tiny black trenches, their walls lined with the spore-producing tissue.
Biologically, the graphis script lichen is a partnership, a fungus and an alga living together. The fungus provides structure and protection. The alga provides food through photosynthesis. The lirellae are the fruiting bodies, producing spores that will grow into new lichens.
To find graphis script lichen is to find the tiny writing on the bark. It is pale, crusty, and scripted, a living message on the tree. You can run your finger over the surface and feel the fine, black lines. It is the lichen of the unfinished letter, the one that looks like someone tried to write on the bark and gave up, the one that proves that the forest has its own language, if you know how to read it.